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This proved Einsteins Theory of Relativity.
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The Holocaust, also known as the Shoah, was a genocide in which Adolf Hitler's Nazi Germany and its collaborators killed about six million Jews.
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World War II begins.
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FDR authorizes the Manhattan Engineering District for the purpose of creating an atomic bomb. This would later be called the 'Manhattan Project'.
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President Roosevelt signed an executive order in February 1942 ordering the relocation of all Americans of Japanese ancestry to concentration camps in the interior of the United States.
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He is promoted to Brigadier General six days later.
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Secretary of War Henry Stimson creates a Military Policy Committee to help make decisions for the Manhattan Project.
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Japan becomes the primary target for any future atomic bomb according to the Military Policy Committee of the Manhattan Project.
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President Roosevelt approves the S-1 Executive Committee recommendation to proceed to the pilot plant stage and instructs that plant construction be the responsibility of the Army. The Office of Scientific Research and Development continues to direct nuclear research, while the Army delegates the task of plant construction to the Corps of Engineers.
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The Target Committee of the Manhattan Project select four cities as possible targets for the atomic bomb. They are: Kyoto, Hiroshima, Kokura, and Niigata.
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This time resulting in 83,000 deaths.
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Leo Szilard begins a petition to get President Truman to call off using the atomic bomb in Japan.
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Truman, Chinese President Chiang Kai-Shek, and new British Prime Minister Clement Atlee issue the Potsdam Proclamation, calling for Japan to surrender unconditionally.
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The gun model uranium bomb, called Little Boy, is dropped on Hiroshima. It kills between 90,000 and 100,000 people immediately. Truman announces the raid to the American public.
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The implosion model plutonium bomb, called Fat Man, is dropped on Nagasaki. (it was scheduled to be dropped at Kokura. However, because of poor weather the target was moved to Nagasaki.)
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A slightly amended version of the McMahon bill.