Of the hundreds of scientists who worked under Oppenheimerto develop the first atomic bomb, only one ceased hisresearch and left Los Alamos on moral grounds once itbecame clear that Hitler had been unable to make a weapon. You probably couldn't have asked for a more thoughtfulChair of the Joint Chiefs than Mark Milley, whose term endson September 30. Rotblat wasawarded the Nobel Peace Prize in 1995, a half-century afterthe first nuclear bombs were dropped on Japan.