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The U.S. wanted to prevent Germany from becoming the first country to build an atomic bomb which would give Germany formative power. General Leslie R. Groves was put in charge of The Manhattan Project to develop the bomb, and scientists use theories about nuclear fission to construct bombs with the elements of Uranium-235 and Plutonium-239. The first successful bomb was code-named "Trinity," and it exploded on July 16, 1945. Less than a month later, the United States dropped the bomb Little Boy on Hiroshima.

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13y ago

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