From Manhattan to Hiroshima: the race for the atom bomb

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The atomic bombings of Hiroshima and Nagasaki capped six years of top-secret work by scientists from Europe and North America.

Here is an overview of how that process unfolded.In 1939, Albert Einstein signs a letter warning US president Franklin D. Roosevelt of the destructive potential of nuclear fission, which was discovered by the German chemist Otto Hahn. The letter says the process could result in"extremely powerful bombs of a new type". Roosevelt creates the Advisory Body on Uranium.On December 7, 1941, Japanese warplanes destroy much of the US Pacific fleet based at Pearl Harbor.

On April 12, Roosevelt dies and Harry Truman becomes president of the United States and learns of the"Manhattan Project".- First American test - On July 16, at 5:30 am, the"Trinity" test takes place near Alamogordo, New Mexico, demonstrating the awesome power of an atomic bomb and marking the dawn of the nuclear age.

 

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