The possible proliferation of chemical, biological, and nuclear weapons (known collectively as Weapons of Mass Destruction-WMD) and their delivery systems to additional nations or subnational groups poses significant challenges for U.S. national security policy. The complex challenges presented by the threat of WMD proliferation have diplomatic, technological, and economic aspects. The United States is a signatory to several international agreements, including the Nuclear Nonproliferation Treaty, the Chemical Weapons Convention, and ...
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