Leo Szilard invented and patented it in 1934 in London.
The Manhattan Project, involving thousands, developed it between 1942 and 1945. testing the implosion design on July 16, 1945.
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No president invented any nuclear bomb.
There were no nuclear weapons in WW1. The nuclear bomb was not invented until WW2.
No, it was invented in London in 1933 and built in Los Alamos, NM in 1945.
robert serber
Leo Szilard invented the atomic bomb in 1933, but could not build it by himself.The US built the first atomic bombs in 1945 and dropped 2 on Japan by airplane.No nuclear missiles have ever been launched in war.