Roosevelt, Franklin Uranium

Albert Einstein s 1939 letter to President Franklin Roosevelt reporting the possibility of German atomic bomb research led FDR to appoint a Uranium Committee headed by ineffectual Bureau of Standards director Lyman J. Briggs (left). 

Einstein writes a letter to US president Franklin D. Roosevelt, calling the presidents attention to the German fission program and urging the creation of a US government-sponsored program to pursue fission and develop an atomic bomb Roosevelt responds by establishing the Advisory Committee on Uranium. 

Franklin D. Roosevelt US president Roosevelt took office in 1933 and served until his death in 1945, shortly before the end of World War II. Roosevelt created the Advisory Committee on Uranium, an organization that would eventually become the Manhattan Project. Roosevelt had hoped the atomic bomb would make conventional warfare obsolete and help America spread democrafirst atomic bomb was deployed. 

THIN MAN. The original nuclear weapon designs selected by the United States were dubbed Thin Man and Fat Man, after U.S. president Franklin Delano Roosevelt and British prime minister Winston Churchill, respectively. Thin Man was to be a gun-type nuclear device, while Fat Man would be an implosion device. Both would use plutonium as the nuclear explosive. The design for Fat Man proved successful, but that for Thin Man encountered technical problems, causing it to be abandoned and an alternate design— Little Boy —using uranium was selected. 

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