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