In this interview Robert Bacher discusses science policy and physicists' involvement in it after World War II through 1970. Topics discussed include: General Leslie Groves; international control of atomic energy; Chauncey Star; Manson Benedict; Report on the International Control of Atomic Energy (Acheson–Lilienthal Report); Dean Acheson; David Lilienthal; J. Robert Oppenheimer; Charles Thomas; International Atomic Energy Agency; Bernard Baruch; Baruch Proposal; Richard Tolman; Hans Kramers; Dmitri Skobeltsyn; Atomic Energy Commission; Robert Wilson; Cornell University; Sam Goudsmit; Columbia University; I. I. Rabi; Hans Bethe; Roswell Clifton Gibbs; Enrico Fermi; Milton Stanley Livingston; Massachusetts Institute of Technology; Willy Higinbotham; Lee DuBridge; California Institute of Technology; Richard Feynman; Los Alamos National Laboratory; Lewis Strauss; William W. Waymack; Sumner Pike; Carroll Wilson; President Harry S. Truman; James Fisk; Office of Naval Research; President Dwight Eisenhower; Jim Killian; Ernest Lawrence; arms control.