World War II was the war that changed the world forever; nuclear weapons were created. German and Japanese forces united and fought American, French, and British forces. Throughout this time, German forces figured out how to split the atom and harness its energy, which could be used to create a nuclear bomb. It was now a race. Who would build the world 's first nuclear weapon: America or Germany? Although the German nuclear threat was evident, the effect of Einstein’s letter to President Roosevelt showed American citizens were fearful, provided scientific facts pertaining to the nuclear bomb, and most importantly, motivated Roosevelt to take action. Who wouldn’t be fearful of a possible nuclear bomb? Einstein was very prominent during