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United Nations Formed
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22nd Amendment
prohibits anyone who has been elected president twice from being elected again -
Truman Doctrine
policy that gave military and economic aid to countries threatened by communism -
Berlin Airlift
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Marshall Plan
program to help European countries rebuild after World War II -
NATO Established
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Korean War
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Rosenbergs Trial
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First H-Bomb detonated by the United States
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Jonas Salk invents the Polio Vaccine
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USSR Launches Sputnik