Of all the scientists involved in the Manhattan Project, only one walked away from the plan to build a nuclear bomb. But you won't hear the name Joseph Rotblat — or the story of how he brought the fight for nuclear disarmament to a small Nova Scotia village — in Christopher Nolan's hit film Oppenheimer. Rotblat, a Polish-Jewish physicist, was a member of the British delegation to the top secret U.S.-led mission to develop nuclear weapons known as the Manhattan Project. He left on moral grounds when it became clear that the U.S. would continue to develop an atomic bomb...