Defense Threat Reduction Agency

The Defense Threat Reduction Agency is an agency within the United States Department of Defense and is the official Combat Support Agency for countering weapons of mass destruction . According to the agency's Strategic Plan for Fiscal Years 2018 to 2022, the DTRA mission "enables DoD and the U.S. Government to prepare for and combat weapons of mass destruction and improvised threats and to ensure nuclear deterrence." The agency is headquartered in Fort Belvoir, Virginia.

DTRA was officially established on October 1, 1998, as a result of the 1997 Defense Reform Initiative, by consolidating several DoD organizations, including the Defense Special Weapons Agency and the On-Site Inspection Agency. The Defense Technology Security Administration and the Nunn–Lugar Cooperative Threat Reduction program office in the Office of the Secretary of Defense were also incorporated into the new agency.

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