Question

Why did Einstein write a letter to

Franklin Roosevelt? ​

Answer 1

In August 1939, Einstein wrote to U.S. President Franklin Roosevelt to warn him that the Nazis were working on a new and powerful weapon: an atomic bomb. Fellow physicist Leo Szilard urged Einstein to send the letter and helped him draft it.

Answer 2

Einstein feared that the German under the rule of the with nazis has developed the atomic bomb and could miss use it. He wrote to the president of USA to warm him of his development.