A changing security environment makes new thinking about weapons of mass destruction (WMD), and nuclear weapons in particular, more important than ever. To develop new approaches to this problem, the Pacific Forum, working through the Council on Security Cooperation in the Asia Pacific (CSCAP), has for four years chaired a Study Group on Countering the Proliferation of Weapons of Mass Destruction in the Asia Pacific. This group has worked assiduously – and with some success – to raise awareness among Asia Pacific nations of the seriousness of the WMD threat.