Cold War: U.S. Secretary of State Dean Acheson delivers his 'Perimeter Speech', outlining the boundary of U.S. security guarantees.
Accused communist spy Alger Hiss is convicted of perjury.
Cold War: Klaus Fuchs, German émigré and physicist, walks into London's War Office and confesses to being a Soviet spy: for 7 years, he passed top secret data on U.S. and British nuclear weapons research to the Soviet Union, formally charged February 2
Ingrid Bergman's illegitimate child arouses ire in the U.S.
United States defeats England 1–0 in the 1950 FIFA World Cup.
The game show Truth or Consequences debuts on television.
Douglas MacArthur threatens to use nuclear weapons in Korea.
Paula Ackerman becomes the first woman in the United States to serve a congregation as a Rabbi.
The new United Nations headquarters officially opens in New York City.
Korean War: Chinese and North Korean forces capture Seoul.
U.S. President Harry S. Truman relieves General Douglas MacArthur of his Far Eastern commands.
The United States releases an H-bomb on an atoll called Eniwetok.
Korean War: Armistice negotiations begin at Kaesong.
I Love Lucy made its television debut on CBS.
The Marshall Plan expires after distributing more than $13.3 billion USD in foreign aid to rebuild Europe
The Today Show premieres on NBC, becoming one of the longest-running television series in America.
In the United States, a mechanical heart is used for the first time in a human patient.
The United States Senate ratifies a peace treaty with Japan
U.S. President Harry S. Truman announces that he will not seek reelection.