NASA Distinguished Service Medal
Encyclopedia
The NASA Distinguished Service Medal is the highest award which may be bestowed by the National Aeronautics and Space Administration of the United States
. The medal may be presented to any member of the federal government, including both military astronaut
s and civilian employees.
The NASA Distinguished Service Medal is awarded to those who display distinguished service, ability, or courage, and have personally made a contribution representing substantial progress to the NASA mission. The contribution must be so extraordinary that other forms of recognition would be inadequate.
Typical presentations of the NASA Distinguished Service Medal included awards to senior NASA administrators, mission control leaders, and astronauts who have completed several successful space flights. Due to the prestige of the award, the decoration is authorized for wear on active uniforms of the United States military. Another such authorized decoration is the NASA Space Flight Medal
.
Upon the recommendation of NASA, the president may award an even higher honor to astronauts, the Congressional Space Medal of Honor
.
The medal was original awarded by the National Advisory Committee on Aeronautics and was inherited by NASA. The first NASA version (type I), featuring the NASA seal, was issued from 1959 until 1961, when it was replaced by the current type II medal (shown). Only three type I medals were awarded—to John W. Crowley, NASA Director of Aeronautical and Space Research; and Mercury astronauts Alan B. Shepard Jr. and Virgil I. "Gus" Grissom.
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. The medal may be presented to any member of the federal government, including both military astronaut
Astronaut
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft....
s and civilian employees.
The NASA Distinguished Service Medal is awarded to those who display distinguished service, ability, or courage, and have personally made a contribution representing substantial progress to the NASA mission. The contribution must be so extraordinary that other forms of recognition would be inadequate.
Typical presentations of the NASA Distinguished Service Medal included awards to senior NASA administrators, mission control leaders, and astronauts who have completed several successful space flights. Due to the prestige of the award, the decoration is authorized for wear on active uniforms of the United States military. Another such authorized decoration is the NASA Space Flight Medal
NASA Space Flight Medal
The NASA Space Flight Medal is a decoration of the National Aeronautics and Space Administration. According to its statutes, it is awarded "for significant achievement or service during individual participation as a civilian or military astronaut, pilot, mission specialist, payload specialist, or...
.
Upon the recommendation of NASA, the president may award an even higher honor to astronauts, the Congressional Space Medal of Honor
Congressional Space Medal of Honor
The Congressional Space Medal of Honor was authorized by the United States Congress in 1969 to recognize "any astronaut who in the performance of his duties has distinguished himself by exceptionally meritorious efforts and contributions to the welfare of the Nation and mankind." The highest award...
.
The medal was original awarded by the National Advisory Committee on Aeronautics and was inherited by NASA. The first NASA version (type I), featuring the NASA seal, was issued from 1959 until 1961, when it was replaced by the current type II medal (shown). Only three type I medals were awarded—to John W. Crowley, NASA Director of Aeronautical and Space Research; and Mercury astronauts Alan B. Shepard Jr. and Virgil I. "Gus" Grissom.
1962
- John GlennJohn GlennJohn Herschel Glenn, Jr. is a former United States Marine Corps pilot, astronaut, and United States senator who was the first American to orbit the Earth and the third American in space. Glenn was a Marine Corps fighter pilot before joining NASA's Mercury program as a member of NASA's original...
- Wally SchirraWally SchirraWalter Marty Schirra, Jr. was an American test pilot, United States Navy officer, and one of the original Mercury 7 astronauts chosen for the Project Mercury, America's effort to put humans in space. He is the only person to fly in all of America's first three space programs...
(October 15, 1962) - Forrest S. PetersenForrest S. PetersenVice Admiral Forrest S. Petersen was a United States Navy aviator and test pilot.-Birth and education:Born in Holdrege, Nebraska, he was the son of Elmer and Stella Petersen. and was raised in Gibbon, Nebraska...
– X-15 pilot
1969
- William A. Anders
- Frank A. Bogart
- Carroll H. Bolender
- Frank BormanFrank BormanFrank Frederick Borman, II is a retired NASA astronaut and engineer, best remembered as the Commander of Apollo 8, the first mission to fly around the Moon, making him, along with fellow crew mates Jim Lovell and Bill Anders, the first of only 24 humans to do so...
- Robert E. Bourdeau
- Eugene A. Cernan
- Roger B. ChaffeeRoger B. ChaffeeRoger Bruce Chaffee was an American aeronautical engineer and a NASA astronaut in the Apollo program. Chaffee died along with fellow astronauts Gus Grissom and Ed White during a pre-launch test for the Apollo 1 mission at Cape Kennedy...
- John F. ClarkJohn F. ClarkJohn F. Clark was the ninth Director of the United States Marshals Service. He was appointed to the position by president George W. Bush on March 17, 2006. On January 3, 2010, Clark joined Lockheed Martin as their director of security operations for information systems and global solutions, to be...
- Raymond L. Clark
- Ozro M. Covington
- Kurt H. DebusKurt H. DebusKurt Heinrich Debus was a German V-2 rocket scientist during World War II who, after being brought to the United States under Operation Paperclip, became the first director of NASA's Kennedy Space Center in 1962. Debus' U.S...
- Maxime A. Faget
- Robert R. Gilruth
- Harry H. Gorman
- Virgil I. Grissom
- Hans F. Gruene
- George H. Hage
- Wesley L. Hjornevik
- Lee B. James
- David M. JonesDavid M. JonesDavid M. Jones was a United States Air Force pilot who served with distinction during World War II. He was one of the Doolittle Raiders whose exploits in April 1942 were dramatized in the film Thirty Seconds Over Tokyo. He then flew combat missions over North Africa, where he was shot down...
- Kenneth S. Kleinknecht
- Christopher C. Kraft
- James A. Lovell
- George M. Low
- Charles W. Matthews
- James A. McDivitt
- Jessie L. Mitchell
- George E. MuellerGeorge Mueller (NASA)George Mueller was Associate Administrator of the NASA Office of Manned Space Flight from September 1963 until December 1969...
- John E. Naugle
- Edmund F. O'ConnorEdmund F. O'ConnorLieutenant General Edmund Francis O'Connor was an American Air Force lieutenant general and command pilot who was vice commander, Air Force Logistics Command, with headquarters at Wright-Patterson Air Force Base, Ohio.-Biography:...
- Rocco A. Petrone
- Samuel C. PhillipsSamuel C. PhillipsGeneral Samuel Cochran Phillips was a United States Air Force four star general who served as Director of NASA's Apollo Manned Lunar Landing Program from 1964 to 1969, the seventh Director of the National Security Agency from 1972 to 1973, and as Commander, Air Force Systems Command from 1973 to...
- Joseph Purcell
- Eberhard F. M. ReesEberhard ReesDr Eberhard Friedrich Michael Rees was a German-American rocketry pioneer and the second Director of the NASA Marshall Space Flight Center...
- Ludie G. Richard
- Arthur RudolphArthur RudolphArthur Louis Hugo Rudolph was a German rocket engineer and member of the Nazi party who played a key role in the development of the V-2 rocket. After World War II he was brought to the United States, subsequently becoming a pioneer of the United States space program. He worked for the U.S...
- Julian W. Scheer
- William C. SchneiderWilliam Schneider, Jr.William J. Schneider, Jr. is an American who has served in a number of prominent federal government positions.Schneider served as Under-Secretary of State in the Reagan administration, and later became a member of the Project for the New American Century...
- Russell L. Schweickart
- David R. Scott
- Robert C. SeamansRobert C. SeamansSSV Robert C. Seamans is a 134-foot steel sailing brigantine operated by the Sea Education Association for oceanographic research and sail training; she is named for a former Chairman and Trustee of SEA's board. She is equipped with hydrographic winches, bathymetric equipment, biological and...
- Willis H. Shapley
- Albert F. Siepert
- Donald K. SlaytonDeke SlaytonDonald Kent Slayton , better known as Deke Slayton, was an American World War II pilot and later, one of the original NASA Mercury Seven astronauts....
- Thomas P. StaffordThomas Patten StaffordThomas Patten Stafford is a retired American Air Force lieutenant general and former NASA astronaut. He flew aboard two Gemini space flights; and in 1969 was the commander of Apollo 10, the second manned mission to orbit the Moon and the first to fly a lunar module there.In 1975, Stafford was...
- Gerald M. Truszynski
- Wernher von BraunWernher von BraunWernher Magnus Maximilian, Freiherr von Braun was a German rocket scientist, aerospace engineer, space architect, and one of the leading figures in the development of rocket technology in Nazi Germany during World War II and in the United States after that.A former member of the Nazi party,...
- Hermann K. Weidner
- Edward H. WhiteEdward Higgins WhiteEdward Higgins White, II was an engineer, United States Air Force officer and NASA astronaut. On June 3, 1965, he became the first American to "walk" in space. White died along with fellow astronauts Gus Grissom and Roger Chaffee during a pre-launch test for the first manned Apollo mission at...
- John J. Williams
- John W. Young
1970
- Edwin E. Aldrin
- Neil A. Armstrong
- Alan L. Bean
- Michael CollinsMichael Collins (astronaut)Michael Collins is a former American astronaut and test pilot. Selected as part of the third group of fourteen astronauts in 1963, he flew in space twice. His first spaceflight was Gemini 10, in which he and command pilot John Young performed two rendezvous with different spacecraft and Collins...
- Charles ConradPete ConradCharles "Pete" Conrad, Jr. was an American naval officer, astronaut and engineer, and the third person to walk on the Moon during the Apollo 12 mission. He set an eight-day space endurance record along with command pilot Gordon Cooper on the Gemini 5 mission, and commanded the Gemini 11 mission...
- Richard F. GordonRichard F. Gordon, Jr.Richard Francis Gordon, Jr., Captain, USN, Ret. is a retired NASA astronaut. He is one of only 24 people to have flown to the Moon.-Military and flight experience:Gordon was born in Seattle, Washington...
- Fred W. HaiseFred HaiseFred Wallace Haise, Jr. is an engineer and former NASA astronaut. He is one of only 24 people to have flown to the Moon. Having flown on Apollo 13, Haise was to be the sixth human to walk on the Moon, but the mission did not land due to a failure aboard the spacecraft.-Early life and...
- James A. Lovell
- Thomas O. PaineThomas O. PaineThomas Otten Paine , American scientist, was the third Administrator of NASA, serving from March 21, 1969 to September 15, 1970.During his administration at NASA, the first seven Apollo manned missions were flown...
- John L. Swigert
1971
- Charles J. Donlan
- James B. Irwin
- Vincent L. Johnson
- Walter J. Kapryan
- Eugene F. KranzEugene F. KranzKranz's book, titled Failure Is Not an Option, published five years after the movie, stated, "...a creed that we all lived by: "Failure is not an option."" . The book has three index references for the phrase, but none of those give any indication of the phrase being apocryphal...
- Bruce T. Lundin
- Glynn S. LunneyGlynn LunneyGlynn S. Lunney is a retired NASA engineer. An employee of NASA since its foundation in 1958, Lunney was a flight director during the Gemini and Apollo programs, and was on duty during historic events such as the Apollo 11 lunar ascent and the pivotal hours of the Apollo 13 crisis...
- James A. McDivitt
- Edgar D. Mitchell
- Bernard Moritz
- Dale D. MyersDale D. MyersDale D. Myers was the Deputy Administrator of NASA between 6 October 1986 and 13 May 1989. He was born on 8 January 1922 in Kansas City, Missouri, and graduated with a Bachelors of Science in Aeronautical Engineering from the University of Washington in Seattle in 1943.- References :...
- Oran W. Nicks
- Stuart A. Roosa
- David R. Scott
- Alan B. Shepard
- Sigurd A. Sjoberg
- John W. Townsend
- Alfred M. Worden
1972
- Charles M. Duke
- Paul Werner GastPaul Werner GastPaul Werner Gast was an American geochemist and geologist.He was born in Chicago, and attended Wheaton College, Illinois from whence he graduated in 1952. He earned a Ph.D. from Columbia University in 1957...
- William R. LucasWilliam R. LucasWilliam R. Lucas was the fourth Director of the NASA Marshall Space Flight Center. He served as director from June 15, 1974 to July 3, 1986; when he retired as a result of the Challenger tragedy.-Early career:...
- Hans M. MarkHans MarkHans Michael Mark is a former Secretary of the Air Force and a former Deputy Administrator of NASA. He is an expert and consultant in aerospace design and national defense policy...
- Thomas K. Mattingly
- Richard C. McCurdy
- William T. Pecora
- Dan Schneiderman
- John W. Young
1973
- George W. S. AbbeyGeorge AbbeyGeorge William Samuel Abbey is a former director of the Johnson Space Center and Fellow in Space Policy at the Baker Institute of Rice University.-Biography:Born in Seattle, Washington, Abbey attended Lincoln High School there...
- Alan L. Bean
- Leland F. Belew
- Charles A. Berry
- Aleck C. Bond
- Anthony J. Calio
- Eugene A. Cernan
- Aaron CohenAaron Cohen (Deputy NASA administrator)Aaron Cohen was the Acting Deputy Administrator of NASA between 19 February 1992 and 1 November 1992.-Education:...
- Charles ConradPete ConradCharles "Pete" Conrad, Jr. was an American naval officer, astronaut and engineer, and the third person to walk on the Moon during the Apollo 12 mission. He set an eight-day space endurance record along with command pilot Gordon Cooper on the Gemini 5 mission, and commanded the Gemini 11 mission...
- Richard W. CookRichard W. CookRichard W. Cook was born in Muskegon, Michigan. From 1927 to 1933, he attended Michigan State University and graduated with a bachelor’s degree in civil engineering.In 1940 he was ordered to active duty in the U.S...
- John H. DisherJohn H. DisherJohn Howard Disher was an American aeronautical engineer and NASA manager.For most of his life he worked for NASA during the Mercury, Gemini, Apollo, Skylab and Space Shuttle projects....
- Paul C. DonnellyPaul C. DonnellyPaul Charles Donnelly is a retired American guided missile pioneer who was a senior NASA manager during the Apollo moon landing program at the Kennedy Space Center . Responsible for the checkout of all Apollo launch vehicles and spacecraft, he was also involved in every U.S...
- Ronald E. Evans
- Arnold W. Frutkin
- Owen K. GarriottOwen K. GarriottOwen Kay Garriott, Ph.D. is a former NASA astronaut who spent 60 days aboard Skylab in 1973 and 10 days aboard Spacelab-1 in 1983. He is also the father of Robert Garriott and fellow spacefarer Richard Garriott, with whom he helped found Origin Systems.-Education and background:Garriott was born...
- Ernst D. Geissler
- Roy E. Godfrey
- Robert H. Gray
- George B. Hardy
- Robert C. Hock
- William P. Horton
- S. Neil Hosenball
- Roy P. Jackson
- Richard S. Johnston
- Joseph P. KerwinJoseph P. KerwinJoseph Peter Kerwin, M.D. is an American physician and former NASA astronaut. Kerwin was the first physician to be selected for astronaut training....
- James E. Kingsbury
- Jack A. Kinzler
- Kenneth S. Kleinknecht
- Joseph N. Kotanchik
- Chester M. Lee
- William E. Lilly
- Jack R. LousmaJack R. LousmaJack Robert Lousma is a former NASA astronaut and politician. He was a member of the second manned crew on the Skylab space station and also commanded the third space shuttle mission...
- Owen G. Morris
- Rocco A. Petrone
- Isom A. Rigell
- Miles RossMiles RossMiles Ross was an American Democratic Party politician and businessman who represented New Jersey's 3rd congressional district in the United States House of Representatives from 1875 to 1883.-Biography:...
- George T. Sasseen
- Harrison H. SchmittHarrison SchmittHarrison Hagan "Jack" Schmitt is an American geologist, a retired NASA astronaut, university professor, and a former U.S. senator from New Mexico....
- William C. Schneider
- Richard G. SmithRichard G. SmithRichard G. Smith was director of NASA’s John F. Kennedy Space Center from September 26, 1979 to August 2, 1986. Born in Durham, N.C., in 1929, Smith was educated in Alabama schools. After graduation from Decatur High School, he attended Florence State College and Auburn University...
- Howard W. Tindall
- Paul J. WeitzPaul J. WeitzPaul Joseph Weitz is an American former astronaut who flew in space twice.-Personal data:Born in Erie, Pennsylvania, on July 25, 1932. Married to the former Suzanne M. Berry of Harborcreek, Pennsylvania. Two children: Matthew and Cynthia. Hunting and fishing are among his hobbies. His mother, Mrs...
1974
- Donald D. Buchanan
- Gerald P. CarrGerald P. CarrGerald Paul Carr is an engineer, retired United States Marine Corps colonel and former NASA astronaut. He was commander of Skylab 4, the third and final manned visit to the Skylab Orbital Workshop, from November 16, 1973 to February 8, 1974.-Biography:Carr was born in Denver, Colorado on August...
- Walker E. Giberson
- Edward G. GibsonEdward GibsonEdward George Gibson, PhD, is a former NASA astronaut, pilot, and engineer.Before becoming a NASA astronaut, Gibson graduated from the University of Rochester and the California Institute of Technology...
- Charles F. Hall
- Robert L. Krieger
- Dale D. MyersDale D. MyersDale D. Myers was the Deputy Administrator of NASA between 6 October 1986 and 13 May 1989. He was born on 8 January 1922 in Kansas City, Missouri, and graduated with a Bachelors of Science in Aeronautical Engineering from the University of Washington in Seattle in 1943.- References :...
- William R. PogueWilliam R. PogueWilliam Reid Pogue is a retired American astronaut who is also an accomplished teacher, public speaker, and author.-Biography:...
- Norman Pozinsky
- Martin L. Raines
- Lee R. SchererLee R. SchererLee R. Scherer was an American aeronautical engineer and director of NASA’s John F. Kennedy Space Center from January 19, 1975 to September 2, 1979...
- John M. Thole
- Robert F. ThompsonRobert F. ThompsonRobert F. Thompson is a Democratic member of the Arkansas Senate, representing the 11th District since 2007. This district includes several counties in northeast Arkansas. From 2005 to 2007, he was a State Representative for the 78th district of the Arkansas House of Representatives, representing...
1975
- Vance D. BrandVance D. BrandVance DeVoe Brand is an engineer and former test pilot and NASA astronaut. He served as command module pilot during the first U.S.-Soviet joint space flight in 1975, and as commander of three space shuttle missions....
- Robert H. Curtin
- M. P. Frank
- Donald P. Hearth
- Chester M. Lee
- Glynn S. LunneyGlynn LunneyGlynn S. Lunney is a retired NASA engineer. An employee of NASA since its foundation in 1958, Lunney was a flight director during the Gemini and Apollo programs, and was on duty during historic events such as the Apollo 11 lunar ascent and the pivotal hours of the Apollo 13 crisis...
- Joseph B. Mahon
- Ellery B. May
- John L. McLucasJohn L. McLucasJohn Luther McLucas was United States Secretary of the Air Force from 1973 to 1975, becoming Secretary of the Air Force on July 19, 1973. He had been Acting Secretary of the Air Force since May 15, 1973, and Under Secretary of the Air Force since March 1969...
- William Nordberg
- George F. Page
- Donald K. SlaytonDeke SlaytonDonald Kent Slayton , better known as Deke Slayton, was an American World War II pilot and later, one of the original NASA Mercury Seven astronauts....
- Thomas P. StaffordThomas Patten StaffordThomas Patten Stafford is a retired American Air Force lieutenant general and former NASA astronaut. He flew aboard two Gemini space flights; and in 1969 was the commander of Apollo 10, the second manned mission to orbit the Moon and the first to fly a lunar module there.In 1975, Stafford was...
- David WilliamsonDavid WilliamsonDavid Keith Williamson AO is one of Australia's best-known playwrights. He has also written screenplays and teleplays.-Biography:...
1976
- Charles J. Donlan
- Isaac T. Gillam
- Charles R. Gunn
- William M. Lohse
- Charles W. Mathews
- John J. Neilon
- Leonard RobertsLeonard Roberts-Early life:Leonard Roberts was born on November 17, 1972, in St. Louis, Missouri. In 1995, Roberts graduated from DePaul University Theater School with a Bachelor of Fine Arts in acting.-Career:...
- William R. Schindler
1977
- Edgar M. CortrightEdgar CortrightEdgar Maurice Cortright is a scientist and engineer, and former senior official at the National Aeronautics and Space Administration in the United States...
- Malcolm R. Currie
- James C. FletcherJames C. FletcherJames Chipman Fletcher was the president of the University of Utah from 1964 to 1971. He also served as the 4th and 7th Administrator of NASA, first from April 27, 1971, to May 1, 1977, and again from May 12, 1986, to April 8, 1989 and also worked at BPP.-Biography:Born in Millburn, New Jersey,...
- Noel W. Hinners
- Leonard Jaffe
- Harriett G. Jenkins
- Robert S. Kraemer
- Bruce T. Lundin
- Hans M. Mark
- James S. MartinJames Martin (NASA)James Slattin Martin, Jr. was project manager for the Viking program.-Biography:As Viking 1 landed on Mars, Martin hung up on a call from President Ford, telling him that he was "busy right now" and to call back in three hours...
- John E. Naugle
- Henry W. Norris
- A. Thomas Young
1978
- Kenneth R. Chapman
- Duward CrowDuward CrowDuward L. Crow was a United States Air Force lieutenant general.Crow graduated from DeKalb County High School in 1936 and entered the University of Alabama. He subsequently received an appointment to the U.S. Military Academy, in West Point, New York, graduating in 1941, and joined what was then...
- Robert H. Curtin
- Marvin L. McNickle
- David R. Scott
- Milton O. ThompsonMilton O. ThompsonMilton Orville Thompson was a NASA research pilot who was selected as an astronaut for the United States Air Force X-20 Dyna-Soar program in April 1960. After the Dyna-Soar program was cancelled on 10 December 1963, he remained a NASA research pilot, and went on to fly the X-15 rocket plane...
- Gerald M. Truszynski
2001
- Jack BrooksJack Brooks (politician)Jack Bascom Brooks is a retired Democratic politician from the U.S. state of Texas, who served for more than 40 years in the U.S. House of Representatives. He was defeated for reelection in the 1994 election...
- Claude NicollierClaude NicollierClaude Nicollier is the first astronaut from Switzerland, and has flown on four Space Shuttle missions. His first spaceflight was in 1992, and his final spaceflight was in 1999. He took part in two servicing missions to the Hubble Space Telescope...
- Courtney StaddCourtney StaddCourtney Stadd was President George W. Bush's transition team's director regarding the National Aeronautics and Space Administration during 2000 and 2001. He subsequently served as NASA chief of staff and White House liaison. He received the NASA Distinguished Service Medal in 2001 for "his...
- James S. VossJames S. VossJames Shelton Voss is the Vice President of Engineering at SpaceDev. He is a retired U.S. Army Colonel and NASA astronaut. During his time with NASA, Voss flew in space five times on board the Space Shuttle and International Space Station...
2008
- Walter CunninghamWalter CunninghamRonnie Walter Cunningham , known as Walt Cunningham, is a retired American astronaut. In 1968, he was the Lunar Module pilot on the Apollo 7 mission...
- Donn Eisele
- Fuk LiFuk LiFuk K. Li is the Director of the Mars Exploration Directorate at NASA's Jet Propulsion Laboratory.Dr. Li’s directorate is responsible for JPL’s projects exploring Mars, including two orbiters , two famous rovers , the Phoenix stationary laboratory which landed near the north pole of Mars in 2008,...
- Walter Schirra
- E. Myles Standish
- Richard Sunseri
2010
- David K. Alonso
- Scott D. Altman
- John M. GrunsfeldJohn M. GrunsfeldJohn Mace Grunsfeld is an American physicist and a NASA astronaut. He is a veteran of five spaceflights and has also served as NASA Chief Scientist.-Personal :...
- Jeffrey M. Hanley
- John T. JamesJohn T. JamesDr. John T. James is the Chief Toxicologist for the National Aeronautics & Space Administration. Dr. James leads the Space Toxicology Office located at Lyndon B. Johnson Space Center in Houston, Texas.- Education :...
- Suresh M. Joshi
- William H. Kinard
- Steven J. OstroSteven J. OstroSteven J. Ostro was an American scientist specializing in Radar Astronomy. He worked at NASA's Jet Propulsion Laboratory. Ostro led radar observations of numerous asteroids, as well as the moons of Jupiter and Saturn, Saturn's rings, and Mars and its satellites...
- Mark L. PolanskyMark L. PolanskyMark Lewis "Roman" Polansky is an American aerospace engineer and research pilot and a NASA astronaut. Polansky received the nickname "Roman" as a joke, because he shares a last name with director Roman Polanski. He has flown on three Space Shuttle missions: STS-98, STS-116, and...
- Frederick Sturckow
- Jacob Trombka
- David A. Wolf