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Enrico Fermi became the first physicist to split the atom.
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Albert Einstein sends a letter to Franklin Roosevelt, warning him that German researchers are working on an atomic bomb.
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President Roosevelt signed an order creating a secret project to develop the nuclear weapon.
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Enrico Fermi demonstrated the first nuclear chain reaction in a lab under the squash court at the University of Chicago.
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The United States exploded the first atomic device at a site near Alamogordo, New Mexico. At 5:30 am, July 16, 1945.
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The United States drops an atomic bomb on Heroshima Japan.
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On this date another B-29 bomber, Bock's car, dropped fat man on Nagasaki Japan
