"Any further spread of nuclear weapons multiplies the possibilities of nuclear confrontation and magnifies the danger of diversion. Thus, if proliferation of weapons of mass destruction continues into Iran and remains in North Korea in the face of all ongoing negotiations, the incentives for other countries to follow the same path will become overwhelming. Considerations as these have induced former Senator Sam Nunn, former Secretary of Defense William Perry, former Secretary of State George Shultz, and I -- two Democrats and two Republicans -- to publish recommendations for systematically reducing and eventually eliminating reliance on nuclear weapons. We have a record of strong commitment to national defense and security. We continue to affirm the importance of adequate deterrent forces, and we do not want our recommendations to diminish essentials for the defense of free peoples while a process of adaptation to new realities is going on. At the same time, we reaffirm the objective of a world without nuclear weapons that has been proclaimed by every American President since President Eisenhower."