Which defense agency counters weapons of mass destruction?

• A. DCMA, the Defense Contract Management Agency
• B. DIA, the Defense Intelligence Agency
• C. NGA, the National Geospatial-Intelligence Agency
• D. DTRA, the Defense Threat Reduction Agency

Answer: (D)

Countering weapons of mass destruction is the Defense Threat Reduction Agency’s main focus. DTRA is dedicated to reducing the threat posed by chemical, biological, radiological, and nuclear weapons, including efforts in counterproliferation, WMD defense, and risk reduction to keep military forces and partners safe. The other agencies have important roles in the broader defense mission but do not specialize in countering WMD threats: DCMA handles defense contracting, DIA provides military intelligence (including some WMD intelligence) rather than direct threat reduction, and NGA focuses on geospatial intelligence. DTRA’s mission aligns specifically with mitigating and defending against WMD threats, making it the best fit for this question.