The Defense Threat Reduction Agency (DTRA) is a Combat Support Agency of the Department of Defense (DoD) and reports to the Under Secretary of Defense for Acquisition, Technology and Logistics through the Director of Defense Research and Engineering.  DTRA is responsible for threat reduction to the United States and its allies from nuclear, biological, chemical (NBC), other special weapons, and from conventional weapons, through the execution of technology security activities, cooperative threat reduction (CTR) programs, arms control treaty monitoring and on-site inspection, force protection, NBC defense, and counterproliferation (CP); to support the U.S. nuclear deterrent; and to provide technical support on weapons of mass destruction (WMD) matter to the DoD Components.

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