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Picture Harold C. Urey discovered deuterium on August 22, 1931. This was also called heavy hydrogen. Allowing him to find a new method in seperating hydrogen isotopes.This prompted the Manattan Project.
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Picture Leo Szilard discovers the idea of chain reaction. He was walking down the streets of London in September of 1933 and he claims the idea just "came to him."
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Picture Enrico Fermi demonstrates nuclear bombardment in almost every element, which led to the discovery of slow neutrons and later to nuclear fission.
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Picture Niels Bohr attended a meeting at George Washington University to announce the dicovery of Nuclear Fission. Along with Enrico Fermi. Press was kicked out of the room to ensure atomic security.
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Picture In August of 1939 Albert Einstein wrote a letter to President Franklin Roosevelt. This letter concered the use of Uranium as a source of energy. Which led to the formation of the Commitee of Uranium.
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Picture World War II began in September of 1939 which was a major reason behind the developement of the Atomic Bomb. It gave a motive to complete the Manhattan Project.
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Picture In 1941 Franklin D. Roosevelt gave the go-ahead to develope an atomic weapon. This was given to the Manhattan Engineering District. It's headquarters was in Washington D.C.
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Picture The first controlled fission reaction took place in December of 1942 by Enrico Fermi. Thus furthering the progress in the Manhattan Project.
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Picture Trinity Test was the world's first atomic detonation. It was located at Alamogordo, New Mexico.
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Picture Potsdam's Declaration was issued in July of 1945 and wanted the unconditional surrender of Japan. Two days later Japan rejected the declaration.
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Picture Little Boy , a uranium bomb, was dropped on Hiroshima, Japan on August 6, 1945. It took out 90% of the city along with 80,000 lives. This was ordered by President Truman.
