Leó Szilárd
During World War II, Rabinowitch worked in the Metallurgical Laboratory (or "Met Lab"), the Manhattan Project's division at the University of Chicago. At that time he was a member of the Committee on Political and Social Problems, chaired by James Franck. Rabinowitch wrote (with help from Leó Szilárd) what became known as the Franck Report. The report recommended that nuclear energy be brought under civilian rather than military control and argued that the United States should demonstrate the atomic bomb to world leaders in an uninhabited desert or barren island before using it in combat.