HTLINGUAL was a secret Central Intelligence Agency

Central Intelligence Agency

The Central Intelligence Agency is a civilian intelligence agency of the United States government. It is an executive agency and reports directly to the Director of National Intelligence, responsible for providing national security intelligence assessment to senior United States policymakers...

 project to intercept mail

Mail

Mail, or post, is a system for transporting letters and other tangible objects: written documents, typically enclosed in envelopes, and also small packages are delivered to destinations around the world. Anything sent through the postal system is called mail or post.In principle, a postal service...

 destined for the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 and China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 that operated from 1952 until 1973. Originally known under the codename SRPOINTER (also SGPOINTER), the project authority was changed in 1955 and renamed. Early on, only the names and addresses appearing on the exterior of mailed items were collected, but they were later opened at CIA facilities in Los Angeles

Los Angeles, California

Los Angeles , with a population at the 2010 United States Census of 3,792,621, is the most populous city in California, USA and the second most populous in the United States, after New York City. It has an area of , and is located in Southern California...

 and New York.

Mail to and from prominent individuals such as Bella Abzug

Bella Abzug

Bella Savitsky Abzug was an American lawyer, Congresswoman, social activist and a leader of the Women's Movement. In 1971, Abzug joined other leading feminists such as Gloria Steinem and Betty Friedan to found the National Women's Political Caucus...

, Linus Pauling

Linus Pauling

Linus Carl Pauling was an American chemist, biochemist, peace activist, author, and educator. He was one of the most influential chemists in history and ranks among the most important scientists of the 20th century...

, John Steinbeck

John Steinbeck

John Ernst Steinbeck, Jr. was an American writer. He is widely known for the Pulitzer Prize-winning novel The Grapes of Wrath and East of Eden and the novella Of Mice and Men...

, Martin Luther King, Edward Albee

Edward Albee

Edward Franklin Albee III is an American playwright who is best known for The Zoo Story , The Sandbox , Who's Afraid of Virginia Woolf? , and a rewrite of the screenplay for the unsuccessful musical version of Capote's Breakfast at Tiffany's . His works are considered well-crafted, often...

, and Hubert Humphrey

Hubert Humphrey

Hubert Horatio Humphrey, Jr. , served under President Lyndon B. Johnson as the 38th Vice President of the United States. Humphrey twice served as a United States Senator from Minnesota, and served as Democratic Majority Whip. He was a founder of the Minnesota Democratic-Farmer-Labor Party and...

was opened over the course of the operation.