Einstein visited the US for the first time with Chaim Weizmann.

Einstein and his family fled to Princeton, USA, due to Nazi persecution in Germany.

Einstein signed a letter to President Roosevelt warning of the threat of Germany's nuclear weapons program.

Einstein was granted American citizenship.

Einstein was deeply affected by the dropping of atomic bombs on Hiroshima and Nagasaki.

Einstein chaired the Emergency Committee of Atomic Scientists, advocating against re-armament and for a world government.