David Hafemeister is a Science Fellow at Stanford's Center for International Security and Cooperation (2005-6). He is also Professor (emeritus) of Physics at California Polytechnic State University. He spent a dozen years in Washington as Professional Staff Member, Senate Committees on Foreign Relations and Governmental Affairs (1990-93 on arms control treaties at the end of the Cold War), Science Advisor to Senator John Glenn (1975-77), Special Assistant to Under Secretary of State Benson and Deputy-Under Secretary Nye (1977-78), Visiting Scientist in the State Department's Office of Nuclear Proliferation Policy (1979), the Office of Strategic Nuclear Policy (1987) and Study Director at the National Academy of Sciences (2000-02). He also held appointments at Carnegie Mellon, MIT, Stanford, Princeton, and the Lawrence-Berkeley, Argonne and Los Alamos national laboratories. He was Chair of the APS Forum on Physics and Society (1985-6) and the APS Panel on Public Affairs (1996-7). He has written/edited ten books and 140 articles and was awarded the APS Szilard award in 1996.