Why was Albert Einstein famous for the atomic bomb?

Answer 1

Albert Einstein was not directly connected with the development of the atomic bomb. He was a very famous scientist whose name would get the attention of even the highest government officials. He used that fame to ensure that a letter from Fermi about the possibility of an atomic bomb would reach President Roosevelt and would be viewed as a credible letter. This eventually resulted in the creation of the Manhattan Project to develop an atomic bomb. Aside from that initial introductory letter, Einstein had no connection with the Manhattan Project.