There’s no room for failure—when it comes to weapons of mass destruction, even a single incident could be catastrophic.

In July 2006, the FBI created the Weapons of Mass Destruction Directorate, or WMDD, to build a cohesive and coordinated approach to incidents involving nuclear, radiological, biological, or chemical weapons—with an overriding focus on prevention.

To do its job, the WMDD proactively seeks out and relies upon intelligence to drive preparedness, countermeasures, and investigations designed to keep threats from becoming reality. It also taps into the tactical and technical expertise of other FBI operational and support divisions, embedding personnel in these components as needed and coordinating investigations and initiatives. Throughout these efforts, the WMDD supports the broader work of the U.S. government as a leading partner and active contributor to policy decisions.

Inside WMDD
- Leadership: Assistant Director John Perren
- FBI Counterproliferation Center
- Key Programs
- Frequently Asked Questions
- WMD History

Related FBI Websites
- Terrorism
- Critical Incident Response Group
- Directorate of Intelligence
- FBI Laboratory
- National Security Branch

Stories & Features
- Exercise Tests Response to Chemical Attack
- Would-Be Bomber Sentenced in Chicago
- Improvements Since 9/11
- Interview on Five-Year Mark of WMDD:
  Part 1 | Part 2
- Counterproliferation
- Your Role in WMD Prevention
- How We Respond to WMD Threats
- Agroterrorism
- Preventing Nuclear Terrorism
- Investigating Suspicious Powders

Resources
- Domestic Criminal and Epidemiological
  Investigation Handbook (pdf)
- International Criminal and Epidemiological
  Investigations Handbook (pdf)
- Commercial Facilities Food Defense (pdf)