Comment by racer-v

Actually this conference was largely from a previous generation of scientific thinkers. According to their Wikipedia bios, Niels Bohr was the only one of those 10 names involved in the Manhattan Project. Einstein wrote a letter alerting President Roosevelt to the possibility of a German atomic bomb which may have helped inspire the project. Heisenberg was also involved in the war effort but "knew little of the Manhattan Project, so, if he were captured, he would have little intelligence value to the Germans".