Portal:History of science/Article/Week 14, 2006

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Many years later, Albert Einstein and Leó Szilárd re-enact the signing of the Einstein-Szilárd letter to Roosevelt.
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Many years later, Albert Einstein and Leó Szilárd re-enact the signing of the Einstein-Szilárd letter to Roosevelt.

The Einstein-Szilárd letter was a letter sent to President Franklin Delano Roosevelt in August 1939 signed by Albert Einstein but largely written by Leó Szilárd in consultation with fellow Hungarian physicists Edward Teller and Eugene Wigner. The letter advised Roosevelt that Nazi Germany might be conducting research into the possibility of using nuclear fission to create atomic bombs, and suggested that the United States should begin researching the possibility itself.

The letter has often been seen as the origins of the Manhattan Project, the successful wartime nuclear weapons project which produced the bombs which were dropped on Hiroshima and Nagasaki in 1945, though the path from the letter to the bombings though is considerably longer than just this.