This report from the State Department's Bureau of Nonproliferation discusses the United States' efforts to prevent the proliferation of nuclear, chemical, and biological programs. "The U.S. is undertaking many multilateral initiatives with our partners in the global war against terrorism, with our traditional allies, and in the United Nations." The report specifically addresses the following efforts: United Nations Resolutions 1540, Proliferation Security Initiative, building on the Nunn-Lugar Cooperative Threat Reduction Program to create new nonproliferation assistance programs, the G-8 Global Partnership Against the Spread of Weapons and Materials of Mass Destruction, shutting down the A.Q. Khan proliferation network, eliminating Libya's WMD programs, and export control and related border security assistance.
U.S. Department of State: http://www.state.gov