Shultz, Perry,Kissinger and Nunn, bring their long years of experience in defense and international affairs to the issue of updating America's policy of nuclear deterrence based on mutually assured destruction. Since the end of the Cold War conditions have changed and the threat of nuclear destruction has taken new forms. Efforts to reduce the threat of nuclear war, nuclear weapons proliferation, and other dangers stemming from nuclear weapons development, also need to change to reflect the changing times. They outline proposals for these changes based on meetings on these issues at the Hoover Institution in California.