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The Cold War begins because of certain tensions. After the WWII power was shared between both countries, but one wanted to dominate over the other. because the two major powers each possessing nuclear weapons and thereby threatened with mutual assured destruction.
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After the attack in Pearl Harbor, US dropped two atomic bombs, one in Hiroshima that was called "LITTLE BOY" and the other in Nagasaki called "FAT MAN" that causes Japan to surrender in September 9,1945 being like these the end of the WORLD WAR II.
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Was the spaceflight that landed the first humans, Americans Neil Armstrong and Buzz Aldrin. Armstrong became the first to step onto the lunar surface
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At the same year the Berlin Wall was demolished that symbolize the end of the communist empire in Germany also known as the Fall of Communism, the Collapse of Communism, the Revolutions of Eastern Europe and the Autumn of Nations.