This fact sheet offers in-depth background information on the Proliferation Security Initiative. "President Bush announced on May 31, 2003, the Proliferation Security Initiative,which is an effort to enhance and expand our efforts to prevent the flow of WMD, their delivery systems, and related materials on the ground, in the air and at sea to and from countries of proliferation concern. This initiative reflects the need for a more dynamic and active approach to the global proliferation problem. It reflects the reality that proliferators are actively and aggressively seeking WMD using techniques that thwart export controls and enforcement measures. It envisions partnerships of states working in concert, employing their national capabilities to develop a broad range of legal, diplomatic, economic, military and other tools to interdict shipments of such items."
Federation of American Scientists: http://www.fas.org