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Sample response :Nuclear weapon test, 1956The destruction of the Japanese cities of Hiroshima and Nagasaki by American atomic weapons in August 1945 began an arms race between the United States and the Soviet Union. ... This lasted until the signing of the Conventional Forces in Europe treaty of November 1990.
Answer: Originally, only the United States had atomic bombs, but an atomic bomb detonated in 1949 in the Soviet Union and the arms race began. More and bigger explosives began to be constructed by both nations.
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