Christopher Chyba, Princeton University; Dongli Chen, China Arms Control and Disarmament Association; Adel Mahmoud, Princeton University; John Steinbruner, University of Maryland; Respondent: Camille Grand, Ministry of Foreign Affairs, France.This session was part of the 2007 Carnegie International Nonproliferation Conference, “Tomorrow's Solutions,” June 25–26, in Washington, D.C., which addressed the critical challenges confronting the nonproliferation regime and offered policy recommendations to stop the spread and use of nuclear weapons and materials.