Photograph by Orren Jack Turner , Princeton, N.J. Modified with Photoshop by PM_Poon and later by Dantadd . · Public domain · Source
Also called: Einstein
German-born physicist who developed the theory of relativity, emigrated to the US in 1933 fleeing the Nazis, and in 1939 signed the letter urging Roosevelt to develop the atomic bomb
In August 1939 Einstein signed a letter drafted by Szilard warning President Roosevelt that Nazi Germany might build an atomic bomb first and that the United States should speed up its own research.
Hungarian-born physicist who first conceived the nuclear chain reaction and persuaded Einstein to write to Roosevelt warning of the atomic bomb
32nd US president (1933–1945) who led the New Deal and took the US to war after Pearl Harbor; he attended the Cairo and Yalta conferences
From the discovery of fission to the first Soviet bomb — Einstein’s letter, the Manhattan Project, the Trinity test, Hiroshima and Nagasaki, and the dawn of the nuclear age