write a letter warning him about an atomic bomb
Franklin Delano Roosevelt
I think it started by a letter of concern from Albert Einstein to President Franklin Roosevelt.
Albert Einstein.
President Franklin D. Roosevelt
j.robert oppenheimer
Franklin Delano Roosevelt
Albert Einstein
It was mainly Albert Einstein.
He wrote a letter saying that he found a way to make a chain explosion with uranium
Albert Einstein warned President Franklin D. Roosevelt about the potential development of an atomic bomb by the Germans during World War II, which led to the initiation of the Manhattan Project in the United States.
Albert Einstein was never a president.
He warned President Roosevelt that he believed Germany was developing an atomic bomb, so the United States should do so as well.