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U.S. Nuclear Submarine
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Manhattan Project
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1st Atomic Bomb Agreement Signed
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Jefferson Memorial
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The G.I. Bill of Rights
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Franklin D. Roosevelt becomes President
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Yalta Conference
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Bombing of Hiroshima and Nagasaki
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United States enters the United Nations
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Creation of the Central Intelligence Agency, the Department of Defense, the Joint Chiefs of Staff, and the National Security Council
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Marshall Plan
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Development of Hydrogen Bomb
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Twenty-second Amendment
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Nuclear Test
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Dwight D. Eisenhower became President