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The development of the first atomic bomb is signed into agreement by Winston Churchill, the Prime Minister of Great Britain, and President Franklin D. Roosevelt.
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The Jefferson Memorial in Washington, D.C. was dedicated on the 200th anniversary of Thomas Jefferson's birthday by President Franklin D. Roosevelt
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On January, 4 1944 Ralph Bunche appointed the first African American official in the U.S. State Department.
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the United States Senate approves the entry of the United States into the United Nations.
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President Harry Truman signs the Marshall Plan, which authorizes $15 billion in aid for 16 countries.
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President Harry S. Truman orders the development of the hydrogen bomb, in response to the detonation of the Soviet Union's first atomic bomb in 1949.
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The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms.
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Dwight D. Eisenhower is elected as the 34th President of the United States.