United States and weapons of mass destruction
Encyclopedia
The United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

is known to have possessed three types of weapons of mass destruction
Weapons of mass destruction
A weapon of mass destruction is a weapon that can kill and bring significant harm to a large number of humans and/or cause great damage to man-made structures , natural structures , or the biosphere in general...

: nuclear weapon
Nuclear weapon
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter. The first fission bomb test released the same amount...

s, chemical weapons
Chemical warfare
Chemical warfare involves using the toxic properties of chemical substances as weapons. This type of warfare is distinct from Nuclear warfare and Biological warfare, which together make up NBC, the military acronym for Nuclear, Biological, and Chemical...

 and biological weapons
Biological warfare
Biological warfare is the use of biological toxins or infectious agents such as bacteria, viruses, and fungi with intent to kill or incapacitate humans, animals or plants as an act of war...

. The U.S. is the only country to have used nuclear weapons in combat
Atomic bombings of Hiroshima and Nagasaki
During the final stages of World War II in 1945, the United States conducted two atomic bombings against the cities of Hiroshima and Nagasaki in Japan, the first on August 6, 1945, and the second on August 9, 1945. These two events are the only use of nuclear weapons in war to date.For six months...

. The U.S. also used chemical weapons in World War I
World War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. It had secretly developed the earliest form of the atomic weapon during the 1940s under the title "Manhattan Project
Manhattan Project
The Manhattan Project was a research and development program, led by the United States with participation from the United Kingdom and Canada, that produced the first atomic bomb during World War II. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army...

". The United States pioneered both the development of the nuclear fission as well as the hydrogen (nuclear fusion) bomb. It was the world's first and only nuclear power for four years before being joined in the "nuclear club" by the Soviet Union. The United States has the largest number of deployed nuclear weapons in the world, with 300 more deployed nuclear weapons than Russia.

Nuclear weapons


Nuclear weapons have twice been deployed in wartime: two nuclear weapons were used by the United States against Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 in World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 in the atomic bombings of Hiroshima and Nagasaki
Atomic bombings of Hiroshima and Nagasaki
During the final stages of World War II in 1945, the United States conducted two atomic bombings against the cities of Hiroshima and Nagasaki in Japan, the first on August 6, 1945, and the second on August 9, 1945. These two events are the only use of nuclear weapons in war to date.For six months...

. Altogether, the two bombings killed an estimated 200,000 Japanese citizens and injured another 130,000.

The U.S. conducted an extensive nuclear testing program. 1,054 tests were conducted between 1945 and 1992. The exact number of nuclear devices detonated is unclear because some tests involved multiple devices while a few failed to explode or were designed not to create a nuclear explosion. The last nuclear test by the United States was on September 23, 1992; the U.S. has signed but not ratified the Comprehensive Test Ban Treaty
Comprehensive Test Ban Treaty
The Comprehensive Nuclear-Test-Ban Treaty bans all nuclear explosions in all environments, for military or civilian purposes. It was adopted by the United Nations General Assembly on 10 September 1996 but it has not entered into force.-Status:...

.

Currently, the United States nuclear arsenal
Enduring Stockpile
The "Enduring Stockpile" is the United States's arsenal of nuclear weapons following the end of the Cold War.During the Cold War the United States produced over 70,000 nuclear weapons. By its end the U.S. stockpile was about 23,000 weapons of 26 different types...

 is deployed in three areas:
  • Land-based intercontinental ballistic missile
    Intercontinental ballistic missile
    An intercontinental ballistic missile is a ballistic missile with a long range typically designed for nuclear weapons delivery...

    s, or ICBMs;
  • Sea-based, nuclear submarine
    Nuclear submarine
    A nuclear submarine is a submarine powered by a nuclear reactor . The performance advantages of nuclear submarines over "conventional" submarines are considerable: nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for...

    -launched ballistic missile
    Ballistic missile
    A ballistic missile is a missile that follows a sub-orbital ballistic flightpath with the objective of delivering one or more warheads to a predetermined target. The missile is only guided during the relatively brief initial powered phase of flight and its course is subsequently governed by the...

    s, or SLBMs; and
  • Air-based nuclear weapons of the U.S. Air Force
    United States Air Force
    The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

    's heavy bomber group


The United States is one of the five "Nuclear Weapons States" under the Nuclear Non-Proliferation Treaty
Nuclear Non-Proliferation Treaty
The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is a landmark international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation in the peaceful uses of nuclear energy and to...

, which the US ratified in 1968. On October 13, 1999, the U.S. Senate
United States Senate
The United States Senate is the upper house of the bicameral legislature of the United States, and together with the United States House of Representatives comprises the United States Congress. The composition and powers of the Senate are established in Article One of the U.S. Constitution. Each...

 rejected ratification of the Comprehensive Test Ban Treaty
Comprehensive Test Ban Treaty
The Comprehensive Nuclear-Test-Ban Treaty bans all nuclear explosions in all environments, for military or civilian purposes. It was adopted by the United Nations General Assembly on 10 September 1996 but it has not entered into force.-Status:...

, having previously ratified the Partial Test Ban Treaty
Partial Test Ban Treaty
The treaty banning nuclear weapon tests in the atmosphere, in outer space and under water, often abbreviated as the Partial Test Ban Treaty , Limited Test Ban Treaty , or Nuclear Test Ban Treaty is a treaty prohibiting all test detonations of nuclear weapons...

 in 1963. The U.S. has not, however, tested a nuclear weapon
Nuclear testing
Nuclear weapons tests are experiments carried out to determine the effectiveness, yield and explosive capability of nuclear weapons. Throughout the twentieth century, most nations that have developed nuclear weapons have tested them...

 since 1992, though it has tested many non-nuclear components and has developed powerful supercomputer
Supercomputer
A supercomputer is a computer at the frontline of current processing capacity, particularly speed of calculation.Supercomputers are used for highly calculation-intensive tasks such as problems including quantum physics, weather forecasting, climate research, molecular modeling A supercomputer is a...

s in an attempt to duplicate the knowledge gained from testing without the actual tests themselves.

In the early 1990s, the U.S. stopped developing new nuclear weapons and instead devotes most of its nuclear efforts into stockpile stewardship
Stockpile stewardship
Stockpile stewardship refers to the United States program of reliability testing and maintenance of its nuclear weapons without the use of nuclear testing....

, maintaining and dismantling its now-aging arsenal. The administration of George W. Bush
George W. Bush
George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

 decided in 2003 to engage in research towards a new generation of small nuclear weapons, especially "earth penetrators" . The budget passed by the United States Congress
United States Congress
The United States Congress is the bicameral legislature of the federal government of the United States, consisting of the Senate and the House of Representatives. The Congress meets in the United States Capitol in Washington, D.C....

 in 2004 eliminated funding for some of this research including the "bunker-busting
Nuclear bunker buster
Bunker-busting nuclear weapons, also known as earth-penetrating weapons , are a type of nuclear weapon designed to penetrate into soil, rock, or concrete to deliver a nuclear warhead to a target. These weapons would be used to destroy hardened, underground military bunkers buried deep in the ground...

 or earth-penetrating" weapons.

The exact number of nuclear weapons possessed by the United States is difficult to determine. Different treaties and organizations have different criteria for reporting nuclear weapons, especially those held in reserve, and those being dismantled or rebuilt:
  • As of 1999, the U.S. was said to have 12,000 nuclear weapons of all types stockpiled.
  • In its Strategic Arms Reduction Treaty
    START I
    START was a bilateral treaty between the United States of America and the Union of Soviet Socialist Republics on the Reduction and Limitation of Strategic Offensive Arms. The treaty was signed on 31 July 1991 and entered into force on 5 December 1994...

     (START) declaration for 2003, the U.S. listed 5968 deployed warheads as defined by START rules.
  • For 2007, the Bulletin of the Atomic Scientists
    Bulletin of the Atomic Scientists
    The Bulletin of the Atomic Scientists is a nontechnical online magazine that covers global security and public policy issues, especially related to the dangers posed by nuclear and other weapons of mass destruction...

     listed the U.S. with about 5,400 total nuclear warheads: around 3,575 strategic and 500 nonstrategic warheads; and about 1,260 additional warheads held in the inactive stockpile. Other warheads are in some step of the disassembly process.
  • The exact number as of Sept. 30, 2009, was 5,113 warheads, according to a U.S. fact sheet released May 3, 2010.


In 2002, the United States and Russia agreed in the SORT
SORT
The Treaty Between the United States of America and the Russian Federation on Strategic Offensive Reductions , also known as the Treaty of Moscow, was a strategic arms reduction treaty between the United States and Russia that was in force from June 2003 until February 2011 when it was superseded...

 treaty to reduce their deployed stockpiles to not more than 2,200 warheads each. In 2003, the US rejected Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n proposals to further reduce both nation's nuclear stockpiles to 1,500 each. In 2007, for the first time in 15 years, the United States built some new warheads. These were to replace some older warheads as part of the Minuteman III upgrade program. 2007 also saw the first Minuteman III missiles removed from service as part of the drawdown. Overall, stockpile numbers and deployment systems continued to decline as the U.S. approaches the levels prescribed in the SORT treaty which must be achieved by 2012.

In 2010, the Pentagon disclosed that the current size of its nuclear arsenal is a total of 5,113 warheads operationally deployed, kept in active reserve and held in inactive storage. The figure does not include the estimated 4,600 warheads that have been retired and scheduled for dismantlement. The number of operationally deployed strategic warheads stands at 1,968.

Land-based ICBMs

The US Air Force currently operates 450 ICBMs, located primarily in the northern Rocky Mountain
Rocky Mountains
The Rocky Mountains are a major mountain range in western North America. The Rocky Mountains stretch more than from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States...

 states and the Dakotas. These are all of the Minuteman III
LGM-30 Minuteman
The LGM-30 Minuteman is a U.S. nuclear missile, a land-based intercontinental ballistic missile . As of 2010, the version LGM-30G Minuteman-III is the only land-based ICBM in service in the United States...

 ICBM variants. Peacekeeper missiles were phased out of the Air Force inventory in 2005. All USAF Minuteman II missiles have been destroyed in accordance with the START treaty and their launch silos imploded and buried then sold to the public. To comply with the START II
START II
START II was a bilateral treaty between the United States of America and Russia on the Reduction and Limitation of Strategic Offensive Arms. It was signed by United States President George H. W...

 most US multiple independently targetable reentry vehicles, or MIRVs, have been eliminated and replaced with single warhead missiles. However, since the abandonment of the START II treaty, the U.S. is said to be considering retaining 500 warheads on 450 missiles. The U.S. goal under the SORT treaty is to reduce from 1,600 warheads deployed on over 500 missiles in 2003 to 500 warheads on 450 missiles in 2012. The first Minuteman III were removed under this plan in 2007 while, at the same time, the warheads deployed on Minuteman IIIs began to be upgraded from smaller W62
W62
The W62 is an American thermonuclear warhead designed in the late 1960s and manufactured from 1970 to 1976, used on some Minuteman III ICBMs and retired in 2010....

s to larger W87
W87
The W87 is an American thermonuclear missile warhead. It was created for use on the MX or Peacekeeper ICBM, 50 of which, with up to 12 warheads per missile, were deployed during the 1986-2005 period...

s from decommissioned Peacekeeper missiles.

Heavy bomber group

The US Air Force also operates a strategic nuclear bomber fleet. The bomber force consists of 94 B-52 Stratofortresses, and 19 B-2 Spirits. All 64 B-1s
B-1 Lancer
The Rockwell B-1 LancerThe name "Lancer" is only applied to the B-1B version, after the program was revived. is a four-engine variable-sweep wing strategic bomber used by the United States Air Force...

 were retrofitted to operate in a solely conventional mode by 2007 and are no longer counted as nuclear platforms.

In addition to this, the US armed forces can also deploy smaller "tactical" nuclear weapons either through cruise missile
Cruise missile
A cruise missile is a guided missile that carries an explosive payload and is propelled, usually by a jet engine, towards a land-based or sea-based target. Cruise missiles are designed to deliver a large warhead over long distances with high accuracy...

s or with conventional fighter-bomber
Fighter-bomber
A fighter-bomber is a fixed-wing aircraft with an intended primary role of light tactical bombing and also incorporating certain performance characteristics of a fighter aircraft. This term, although still used, has less significance since the introduction of rockets and guided missiles into aerial...

s. The U.S. maintains about 400 nuclear gravity bomb
Gravity bomb
An unguided bomb, also known as a free-fall bomb, gravity bomb, dumb bomb, or iron bomb, is a conventional aircraft-delivered bomb that does not contain a guidance system and hence, simply follows a ballistic trajectory....

s capable of use by F-15
F-15 Eagle
The McDonnell Douglas F-15 Eagle is a twin-engine, all-weather tactical fighter designed by McDonnell Douglas to gain and maintain air superiority in aerial combat. It is considered among the most successful modern fighters with over 100 aerial combat victories with no losses in dogfights...

, F-16
F-16 Fighting Falcon
The General Dynamics F-16 Fighting Falcon is a multirole jet fighter aircraft originally developed by General Dynamics for the United States Air Force . Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft. Over 4,400 aircraft have been built since...

, and F-35
F-35 Lightning II
The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, fifth generation multirole fighters under development to perform ground attack, reconnaissance, and air defense missions with stealth capability...

. Some 350 of these bombs are deployed at seven airbases in six European NATO countries; of these, 180 tactical B61 nuclear bomb
B61 nuclear bomb
The B61 nuclear bomb is the primary thermonuclear weapon in the U.S. Enduring Stockpile following the end of the Cold War. It is an intermediate yield strategic and tactical nuclear weapon featuring a two-stage radiation implosion design....

s fall under a nuclear sharing
Nuclear sharing
Nuclear sharing is a concept in NATO's policy of nuclear deterrence, which involves member countries without nuclear weapons of their own in the planning for the use of nuclear weapons by NATO, and in particular provides for the armed forces of these countries to be involved in delivering these...

 arrangement.

Sea-based ICBMs

The US Navy currently has 18 Ohio-class
Ohio class submarine
The Ohio class is a class of nuclear-powered submarines used by the United States Navy. The United States has 18 Ohio-class submarines:...

 submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

s deployed, of which 14 are ballistic missile submarines. Each submarine is equipped with a complement of 24 Trident II
UGM-133 Trident II
UGM-133 Trident II, or Trident D5 is a submarine-launched ballistic missile, built by Lockheed Martin Space Systems in Sunnyvale, California, and deployed with the US Navy and Royal Navy. It was first deployed in 1990, and is still in service....

 missiles. Approximately 12 U.S. attack submarines are equipped to launch, but do not currently carry nuclear Tomahawk missile
BGM-109 Tomahawk
The Tomahawk is a long-range, all-weather, subsonic cruise missile. Introduced by General Dynamics in the 1970s, it was designed as a medium- to long-range, low-altitude missile that could be launched from a surface platform. It has been improved several times and, by way of corporate divestitures...

s. Sea-launch weapons make up the majority of weapons declared under START II rules. Some Trident missiles are equipped with the W88
W88
The W88 is a United States thermonuclear warhead, with an estimated yield of 475 kiloton , and is small enough to fit on MIRVed missiles. The W88 was designed at the Los Alamos National Laboratory in the 1970s. In 1999 the director of Los Alamos who had presided over its design described it as...

 warhead.

Biological weapons

The United States offensive biological weapons program was instigated by President Franklin Roosevelt and the U.S. Secretary of War
United States Secretary of War
The Secretary of War was a member of the United States President's Cabinet, beginning with George Washington's administration. A similar position, called either "Secretary at War" or "Secretary of War," was appointed to serve the Congress of the Confederation under the Articles of Confederation...

 in October 1941. Research occurred at several sites. A production facility was built at Terre Haute, Indiana
Terre Haute, Indiana
Terre Haute is a city and the county seat of Vigo County, Indiana, United States, near the state's western border with Illinois. As of the 2010 census, the city had a total population of 60,785 and its metropolitan area had a population of 170,943. The city is the county seat of Vigo County and...

 but testing with a benign agent demonstrated contamination of the facility so no production occurred during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. A more advanced production facility was constructed in Pine Bluff, Arkansas
Pine Bluff, Arkansas
Pine Bluff is the largest city and county seat of Jefferson County, Arkansas, United States. It is also the principal city of the Pine Bluff Metropolitan Statistical Area and part of the Little Rock-North Little Rock-Pine Bluff, Arkansas Combined Statistical Area...

, which began producing biological agents in 1954. Fort Detrick, Maryland later became a production facility as well as a research site. The U.S. developed anti-personnel and anti-crop biological weapons. Several deployment systems were developed including aerial spray tanks, aerosol spray canisters, grenades, rocket warheads and cluster bombs. (See also US Biological Weapon Testing)

In mid-1969, the UK and the Warsaw Pact, separately, introduced proposals to the UN to ban biological weapons, which would lead to a treaty in 1972. The U.S. cancelled its offensive biological weapons program by executive order in November 1969 (microorganisms) and February 1970 (toxins) and ordered the destruction of all offensive biological weapons, which occurred between May 1971 and February 1973. The U.S. ratified the Geneva Protocol
Geneva Protocol
The Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare, usually called the Geneva Protocol, is a treaty prohibiting the first use of chemical and biological weapons. It was signed at Geneva on June 17, 1925 and entered...

 on January 22, 1975. The U.S. ratified the Biological Weapons Convention
Biological Weapons Convention
The Convention on the Prohibition of the Development, Production and Stockpiling of Bacteriological and Toxin Weapons and on their Destruction was the first multilateral disarmament treaty banning the...

 (BWC) which came into effect in March 1975.

Negotiations for a legally binding verification protocol to the BWC proceeded for years. In 2001, negotiations ended when the Bush administration
George W. Bush
George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

 rejected an effort by other signatories to create a protocol for verification, arguing that it could be abused to interfere with legitimate biological research.

The U.S. Army Medical Research Institute of Infectious Diseases, located in Fort Detrick
Fort Detrick
Fort Detrick is a U.S. Army Medical Command installation located in Frederick, Maryland, USA. Historically, Fort Detrick was the center for the United States' biological weapons program ....

, Maryland
Maryland
Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

, produces small quantities of biological agents, for use in biological weapons defense research. According to the U.S. government, this research is performed in full accordance with the BWC.

In September 2001, shortly after the September 11 terrorist attacks on New York
New York
New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

 and Washington D.C. there was series of mysterious anthrax
Anthrax
Anthrax is an acute disease caused by the bacterium Bacillus anthracis. Most forms of the disease are lethal, and it affects both humans and other animals...

 attacks aimed at US media offices and the US Senate which killed five people. The anthrax used in the attacks was the Ames strain
Ames strain
The Ames strain is one of 89 known strains of the anthrax bacterium . It was isolated from a diseased 14-month old Beefmaster heifer that died in Sarita, Texas in 1981. The strain was isolated at the Texas Veterinary Medical Diagnostic Laboratory and a sample was sent to the United States Army...

, which was first studied at Fort Detrick and then distributed to other labs around the world. See 2001 anthrax attacks
2001 anthrax attacks
The 2001 anthrax attacks in the United States, also known as Amerithrax from its Federal Bureau of Investigation case name, occurred over the course of several weeks beginning on Tuesday, September 18, 2001, one week after the September 11 attacks. Letters containing anthrax spores were mailed to...

 for more information.

History

The U.S. had entered into the Hague Conventions of 1899 and 1907
Hague Conventions (1899 and 1907)
The Hague Conventions were two international treaties negotiated at international peace conferences at The Hague in the Netherlands: The First Hague Conference in 1899 and the Second Hague Conference in 1907...

 which banned aerial bombing and chemical warfare among other things but which were disregarded in actual combat.

In WWI, the U.S. produced its own munitions as well as deploying weapons produced by the French. The U.S. produced 5,770 metric tons of these weapons, including 1,400 metric tons of phosgene
Phosgene
Phosgene is the chemical compound with the formula COCl2. This colorless gas gained infamy as a chemical weapon during World War I. It is also a valued industrial reagent and building block in synthesis of pharmaceuticals and other organic compounds. In low concentrations, its odor resembles...

 and 175 metric tons of mustard gas. This was about 4% of the total chemical weapons produced for that war and only just over 1% of the era's most effective weapon, mustard gas. (U.S. troops suffered less than 6% of gas casualties.)

After the war, the U.S. was party to the Washington Arms Conference Treaty of 1922 which would have banned chemical weapons but failed because it was rejected by France. The U.S. continued to stockpile
Stockpile (military)
In military preparation, to stockpile is to move materiel, personnel, and command and control infrastructure to a suitable location in preparation for deployment, or to move such materials into the theatre of war in preparation for combat....

 chemical weapons, eventually exceeding 30,000 tons of material.

Chemical weapons were not used by the U.S. or the other Allies
Allies of World War II
The Allies of World War II were the countries that opposed the Axis powers during the Second World War . Former Axis states contributing to the Allied victory are not considered Allied states...

, during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

; however, quantities of such weapons were deployed to Europe for use in case Germany initiated chemical warfare. At least one accident occurred: On the night of December 2, 1943, German Junkers Ju 88
Junkers Ju 88
The Junkers Ju 88 was a World War II German Luftwaffe twin-engine, multi-role aircraft. Designed by Hugo Junkers' company through the services of two American aviation engineers in the mid-1930s, it suffered from a number of technical problems during the later stages of its development and early...

 bombers attacked the port of Bari
Bari
Bari is the capital city of the province of Bari and of the Apulia region, on the Adriatic Sea, in Italy. It is the second most important economic centre of mainland Southern Italy after Naples, and is well known as a port and university city, as well as the city of Saint Nicholas...

 in Southern Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

, sinking several American ships - among them John Harvey, which was carrying mustard gas. The presence of the gas was highly classified, and authorities ashore had no knowledge of it - which increased the number of fatalities, since physicians, who had no idea that they were dealing with the effects of mustard gas, prescribed treatment not consistent with those suffering from exposure and immersion. According to the U.S. military account, "Sixty-nine deaths were attributed in whole or in part to the mustard gas, most of them American merchant seamen" out of 628 mustard gas military casualties. Civilian casualties were not recorded. The whole affair was kept secret at the time and for many years after the war.

After the war, the Allies
Allies
In everyday English usage, allies are people, groups, or nations that have joined together in an association for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out between them...

 recovered German artillery shells containing three new nerve agents developed by the Germans (Tabun, Sarin
Sarin
Sarin, or GB, is an organophosphorus compound with the formula [2CHO]CH3PF. It is a colorless, odorless liquid, which is used as a chemical weapon. It has been classified as a weapon of mass destruction in UN Resolution 687...

, and Soman
Soman
Soman, or GD , is an extremely toxic chemical substance. It is a nerve agent, interfering with normal functioning of the mammalian nervous system by inhibiting the cholinesterase enzyme. As a chemical weapon, it is classified as a weapon of mass destruction by the United Nations according to UN...

), prompting further research into nerve agent
Nerve agent
Nerve agents are a class of phosphorus-containing organic chemicals that disrupt the mechanism by which nerves transfer messages to organs...

s by all of the former Allies. Thousands of American soldiers were exposed to warfare agents during Cold War
Cold War
The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

 testing programs as well as in accidents. One such accident in 1968, killed approximately 6,400 sheep when an agent drifted out of Dugway Proving Ground
Dugway Proving Ground
Dugway Proving Ground is a US Army facility located approximately 85 miles southwest of Salt Lake City, Utah in southern Tooele County and just north of Juab County...

 during a test.

The U.S. also investigated a wide range of possible nonlethal, psychobehavioral chemical incapacitating agents including psychedelic
Psychedelic
The term psychedelic is derived from the Greek words ψυχή and δηλοῦν , translating to "soul-manifesting". A psychedelic experience is characterized by the striking perception of aspects of one's mind previously unknown, or by the creative exuberance of the mind liberated from its ostensibly...

 indole
Indole
Indole is an aromatic heterocyclic organic compound. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring. Indole is a popular component of fragrances and the precursor to many pharmaceuticals. Compounds that contain an...

s such as lysergic acid diethylamide
LSD
Lysergic acid diethylamide, abbreviated LSD or LSD-25, also known as lysergide and colloquially as acid, is a semisynthetic psychedelic drug of the ergoline family, well known for its psychological effects which can include altered thinking processes, closed and open eye visuals, synaesthesia, an...

 (experimented to see if it could be used for effective mind control
Mind control
Mind control refers to a process in which a group or individual "systematically uses unethically manipulative methods to persuade others to conform to the wishes of the manipulator, often to the detriment of the person being manipulated"...

) and marijuana
Cannabis (drug)
Cannabis, also known as marijuana among many other names, refers to any number of preparations of the Cannabis plant intended for use as a psychoactive drug or for medicinal purposes. The English term marijuana comes from the Mexican Spanish word marihuana...

 derivatives, certain tranquilizers like ketamine
Ketamine
Ketamine is a drug used in human and veterinary medicine. Its hydrochloride salt is sold as Ketanest, Ketaset, and Ketalar. Pharmacologically, ketamine is classified as an NMDA receptor antagonist...

 or fentanyl, as well as several glycolate anticholinergics. One of the anticholinergic compounds, 3-quinuclidinyl benzilate
3-Quinuclidinyl benzilate
3-quinuclidinyl benzilate , IUPAC name 1-azabicyclo[2.2.2]Oct-3-yl α-hydroxy-α-phenylbenzeneacetate, is an odorless military incapacitating agent. Its NATO code is BZ...

, was assigned the NATO code BZ and was weaponized at the beginning of the 1960s for possible battlefield use. This agent was allegedly employed by American troops as a counterinsurgency weapon in the Vietnam War
Vietnam War
The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

 but the U.S. maintains that this agent never saw operational use. The North Koreans and Chinese have alleged that chemical and biological weapons were used by the United States in the Korean War
Korean War
The Korean War was a conventional war between South Korea, supported by the United Nations, and North Korea, supported by the People's Republic of China , with military material aid from the Soviet Union...

; but, the United States denial is supported by Russian archival documents.

On November 25, 1969, President Richard Nixon
Richard Nixon
Richard Milhous Nixon was the 37th President of the United States, serving from 1969 to 1974. The only president to resign the office, Nixon had previously served as a US representative and senator from California and as the 36th Vice President of the United States from 1953 to 1961 under...

 unilaterally renounced the first use of chemical weapons and renounced all methods of biological warfare. He issued a unilateral decree halting production and transport of chemical weapons which remains in effect. From 1967 to 1970 in Operation CHASE
Operation CHASE
Operation CHASE was a United States Department of Defense program that involved the disposal of unwanted munitions at sea from May 1964 into the early 1970s....

, the U.S. disposed of chemical weapons by sinking ships laden with the weapons in the deep Atlantic
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

. The U.S. began to research safer disposal methods for chemical weapons in the 1970s, destroying several thousand tons of mustard gas by incineration at Rocky Mountain Arsenal and nearly 4,200 tons of nerve agent by chemical neutralization at Tooele Army Depot and Rocky Mountain Arsenal.

The U.S. began stockpile reductions in the 1980s, removing some outdated munitions and destroying its entire stock of BZ beginning in 1988. In June 1990, Johnston Atoll Chemical Agent Disposal System
Johnston Atoll Chemical Agent Disposal System
Johnston Atoll Chemical Agent Disposal System was the U.S. Army's first chemical munitions disposal facility. It was located on Johnston Island, at Johnston Atoll and completed its mission and ceased operation in 2000.-Background:...

 began destruction of chemical agents stored on Johnston Atoll
Johnston Atoll
Johnston Atoll is a atoll in the North Pacific Ocean about west of Hawaii. There are four islands located on the coral reef platform, two natural islands, Johnston Island and Sand Island, which have been expanded by coral dredging, as well as North Island and East Island , an additional two...

 in the Pacific, seven years before the Chemical Weapons Treaty came into effect. In 1986 President Ronald Reagan
Ronald Reagan
Ronald Wilson Reagan was the 40th President of the United States , the 33rd Governor of California and, prior to that, a radio, film and television actor....

 made an agreement with Chancellor Helmut Kohl
Helmut Kohl
Helmut Josef Michael Kohl is a German conservative politician and statesman. He was Chancellor of Germany from 1982 to 1998 and the chairman of the Christian Democratic Union from 1973 to 1998...

 to remove the U.S. stockpile of chemicals weapons from Germany. As part of Operation Steel Box, in July 1990, two ships were loaded with over 100,000 shells containing GB and VX taken from US Army weapons storage depots such as Miesau and then-classified ammunition FSTS (Forward Storage/Transportation Sites) and transported from Bremerhaven Germany to Johnston Atoll in the Pacific, a 46-day nonstop journey
Operation Steel Box
Operation Steel Box, also known as Operation Golden Python, was a 1990 joint U.S.-West German operation which moved 100,000 U.S. chemical weapons from Germany to Johnston Atoll.-Background:...

.

In May 1991, President George H.W. Bush unilaterally committed the United States to destroying all chemical weapons and renounced the right to chemical weapon retaliation. In 1993, the United States signed the Chemical Weapons Treaty, which required the destruction of all chemical weapon agents, dispersal systems, chemical weapons production facilities by April 2012. The U.S. prohibition on the transport of chemical weapons has meant that destruction facilities had to be constructed at each of the U.S.'s nine storage facilities. The U.S. met the first three of the treaty's four deadlines, destroying 45% of its stockpile of chemical weapons by 2007. However, official expectations for the date of complete elimination of all chemical weapons was after the treaty deadline of 2012.

Under the United States policy of Proportional Response, an attack upon the United States or its Allies would trigger a force-equivalent counter-attack. Since the United States only maintains nuclear Weapons of Mass Destruction, it is the stated policy that the United States will regard all WMD attacks (Biological, Chemical, or Nuclear) as a nuclear attack and will respond to any WMD attack with a nuclear strike.

Treaties

The United States was a party to some of the earliest modern chemical weapons ban treaties, the Hague Conventions of 1899
Hague Conventions (1899 and 1907)
The Hague Conventions were two international treaties negotiated at international peace conferences at The Hague in the Netherlands: The First Hague Conference in 1899 and the Second Hague Conference in 1907...

 and the Washington Arms Conference Treaty of 1922 although these treaties were unsuccessful. The U.S. ratified the Geneva Protocol
Geneva Protocol
The Protocol for the Prohibition of the Use in War of Asphyxiating, Poisonous or other Gases, and of Bacteriological Methods of Warfare, usually called the Geneva Protocol, is a treaty prohibiting the first use of chemical and biological weapons. It was signed at Geneva on June 17, 1925 and entered...

 which banned the use of chemical and biological weapons on January 22, 1975. In 1989 and 1990, the U.S. and the Soviet Union entered an agreement to end their chemical weapons programs, including "binary weapons". The United States ratified the Chemical Weapons Convention
Chemical Weapons Convention
The Chemical Weapons Convention is an arms control agreement which outlaws the production, stockpiling and use of chemical weapons. Its full name is the Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on their Destruction...

 which came into force in April 1997. This banned the possession of most types of chemical weapons, some of which were possessed by the U.S. at the time. It also banned chemical weapons development, and requires the destruction of existing stockpiles, precursor chemicals, production facilities and weapon delivery systems.

Chemical weapons disposal

According to the U.S. Army Chemical Materials Agency by August, 2011, the United States had destroyed 88% of the original stockpile of nearly 31,100 metric tons (30,609 long ton
Long ton
Long ton is the name for the unit called the "ton" in the avoirdupois or Imperial system of measurements, as used in the United Kingdom and several other Commonwealth countries. It has been mostly replaced by the tonne, and in the United States by the short ton...

s) of nerve and mustard agents declared in 1997. The U.S. disposed of the more dangerous modern chemical weapons before starting the destruction of its older mustard gas stockpile which presented additional difficulties due to the poor condition of some of the shells. Of the weapons destroyed up to 2006, only 500 tons were mustard gas and the majority were other agents such as VX
VX (nerve agent)
VX, IUPAC name O-ethyl S-[2-ethyl] methylphosphonothioate, is an extremely toxic substance whose only application is in chemical warfare as a nerve agent. As a chemical weapon, it is classified as a weapon of mass destruction by the United Nations in UN Resolution 687...

 and sarin
Sarin
Sarin, or GB, is an organophosphorus compound with the formula [2CHO]CH3PF. It is a colorless, odorless liquid, which is used as a chemical weapon. It has been classified as a weapon of mass destruction in UN Resolution 687...

 (GB) (86% of the latter was destroyed by April 2006).

13,996 metric tons (13,775 long tons) of prohibited weapons had been destroyed by June 2007 to meet the Phase III quota and deadline. The original commitment in Phase III required all countries to have 45 percent of the chemical stockpiles destroyed by April 2004. Anticipating the failure to meet this deadline, the Bush administration in September 2003 requested a new deadline of December 2007 for Phase III and announced a probable need for an extension until April 2012 for Phase IV, total destruction (requests for deadline extensions cannot formally be made until 12 months before the original deadline). This extension procedure spelled out in the treaty has been utilized by other countries, including Russia and the unnamed "state party". Although April 2012 is the latest date allowed by the treaty, the U.S. also noted that this deadline may not be met due to environmental challenges and the U.S. decision to destroy leaking individual chemical shells before bulk storage chemical weapons.

The primary chemical weapon storage facilities in the U.S. are Pueblo Chemical Depot
Pueblo Chemical Depot
The Pueblo Chemical Depot is a chemical weapons storage site located in Pueblo County, Colorado, United States.The depot houses 2,611 tons of mustard agent in approximately 780,000 munitions, equivalent to about seven percent of the original chemical material stockpile of the United States...

 in Colorado
Colorado
Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

, Blue Grass Army Depot
Blue Grass Army Depot
Blue Grass Army Depot is a U.S. Army conventional munitions and chemical weapon storage facility located in east central Kentucky, southeast of the cities of Lexington and Richmond, Kentucky, operated by the United States Army. The site, composed mainly of open fields and wooded areas, is used...

 in Kentucky
Kentucky
The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...

, and Deseret Chemical Depot
Deseret Chemical Depot
The Deseret Chemical Depot is a U.S. Army chemical weapon storage area located in Utah, 60 miles southwest of Salt Lake City. It is related to the Tooele Chemical Agent Disposal Facility.-History:...

 in Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

. The largest of these facilities is Deseret. Other non-stockpile agents (usually test kits) or old buried munitions are occasionally found and are sometimes destroyed in place.

Disposal of chemical munitions is occurring at Tooele Chemical Demilitarization Facility (for Deseret). Pueblo and Blue Grass are constructing pilot plans to test novel methods of disposal but full plants may not open until 2013. The U.S. also uses mobile treatment systems to treat chemical test samples and individual shells without requiring transport from the artillery ranges and abandoned munitions depots where they are occasionally found.

In 1988–1990, the destruction of munitions containing BZ
3-Quinuclidinyl benzilate
3-quinuclidinyl benzilate , IUPAC name 1-azabicyclo[2.2.2]Oct-3-yl α-hydroxy-α-phenylbenzeneacetate, is an odorless military incapacitating agent. Its NATO code is BZ...

, a non-lethal hallucinating agent at Pine Bluff Chemical Activity
Pine Bluff Chemical Activity
Pine Bluff Chemical Activity is a U.S. Army agency that controlled the chemical weapon storage site located at Pine Bluff Arsenal in Pine Bluff, Arkansas. The U.S. Army stored approximately twelve percent of its original chemical weapons at the Pine Bluff Arsenal since 1942...

 in Arkansas
Arkansas
Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

. Hawthorne Army Depot
Hawthorne Army Depot
Hawthorne Army Depot is a U.S. Army ammunition storage site located near the town of Hawthorne in western Nevada in the United States. It is directly south of Walker Lake. The depot covers and has storage space in 2,427 bunkers...

 in Nevada destroyed all M687 chemical artillery shell
M687
The M687 is an American 155 mm binary sarin chemical weapon artillery shell. The design was standardized in 1976 and production began on December 16, 1987 at Pine Bluff Arsenal, Pine Bluff, Arkansas...

s and 458 metric tons of binary precursor chemicals by July 1999. Operations were completed at Johnston Atoll Chemical Agent Disposal System
Johnston Atoll Chemical Agent Disposal System
Johnston Atoll Chemical Agent Disposal System was the U.S. Army's first chemical munitions disposal facility. It was located on Johnston Island, at Johnston Atoll and completed its mission and ceased operation in 2000.-Background:...

 where all 640 metric tons of chemical agents were destroyed by 2000 and at Edgewood Chemical Activity
Edgewood Chemical Activity
The Edgewood Chemical Activity was a U.S. Army site located in Edgewood, Maryland that stored chemical weapons. Since 1941, the U.S. Army stored approximately five percent of the nation's original chemical agent in steel ton containers, at the Edgewood Area of Aberdeen Proving Ground...

 in Maryland
Maryland
Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

, with 1,472 metric tons of agents destroyed by February 2006. All DF
Methylphosphonyl difluoride
Methylphosphonyl difluoride , also called methyl difluorophosphite, methylphosphonic difluoride, and difluoromethylphosphine oxide, is a chemical weapon precursor. It is a Schedule 1 substance in the sense of the Chemical Weapons Convention...

 and QL, chemical weapons precursors, were destroyed in 2006 at Pine Bluff. Newport Chemical Depot
Newport Chemical Depot
The Newport Chemical Depot, previously known as the Wabash River Ordinance Works and the Newport Army Ammunition Plant, was a bulk chemical storage and destruction facility in west central Indiana, thirty miles north of Terre Haute operated by the United States Army...

 in Indiana
Indiana
Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...

 began destruction operations in May, 2005 and completed operations on August 8, 2008, disposing of 1,152 tonnes of agents. Pine Bluff completed destruction of 3,850 tons of weapons on November 12, 2010. Anniston Chemical Activity
Anniston Chemical Activity
Anniston Chemical Activity is a U.S. Army chemical weapon storage site located in Alabama. The Army had stored approximately seven percent of the nation’s original chemical weapons stockpile at the Anniston Army Depot since the early 1960s. In August 2003, the Army began disposing of these weapons...

 in Alabama
Alabama
Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

 completed disposal on September 22, 2011. Umatilla Chemical Depot
Umatilla Chemical Depot
The Umatilla Chemical Depot, based in Umatilla, Oregon, was a U.S. Army installations in the United States that stored chemical weapons. The chemical weapons originally stored at the depot consisted of various munitions and ton containers containing GB and VX nerve agents and HD blister agent...

 in Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

 finished disposal on October 25, 2011.

See also

  • Defense Threat Reduction Agency
    Defense Threat Reduction Agency
    The Defense Threat Reduction Agency is an agency within the United States Department of Defense and is the official Combat Support Agency for countering weapons of mass destruction . DTRA's main functions are threat reduction, threat control, combat support, and technology development...

     - The U.S. Department of Defense’s official Combat Support Agency for countering weapons of mass destruction.
  • Dugway sheep incident
    Dugway sheep incident
    The Dugway sheep incident, also known as the Skull Valley sheep kill, was a 1968 sheep kill that has been connected to United States Army chemical and biological warfare programs at Dugway Proving Ground in Utah...

  • Enduring Stockpile
    Enduring Stockpile
    The "Enduring Stockpile" is the United States's arsenal of nuclear weapons following the end of the Cold War.During the Cold War the United States produced over 70,000 nuclear weapons. By its end the U.S. stockpile was about 23,000 weapons of 26 different types...

     - the name of the United States's remaining arsenal of nuclear weapons following the end of the Cold War.
  • List of U.S. biological weapons topics
  • Operation Paperclip
    Operation Paperclip
    Operation Paperclip was the Office of Strategic Services program used to recruit the scientists of Nazi Germany for employment by the United States in the aftermath of World War II...

     - the codename under which the US intelligence and military services extricated scientists from Germany, during and after the final stages of World War II.
  • Russia and weapons of mass destruction
    Russia and weapons of mass destruction
    Russia possesses the largest stockpiles of weapons of mass destruction in the world. The country declared an arsenal of 39,967 tons of chemical weapons in 1997, of which 48% have been destroyed. The Federation of American Scientists, a renowned organization for assessing nuclear weapon...

  • United States Army Chemical Corps
  • United States missile defense

External links

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