The Science and Technology Directorate's Explosives Division (EXD) works with universities, industry and other Department of Homeland Security (DHS) components to develop new technologies and systems capable of detecting or mitigating non-nuclear explosives.

To support this mission, EXD's programs focus on three operational areas:

• Aviation Security: developing technology to protect airports, airplanes and the travelling public.
• Facilities Protection: developing technologies that allow better screening for threats entering key public buildings or large special events, such as the Super Bowl or political conventions.
• Intermodal Security: developing systems capable of screening for threats within high-volume, mass transportation systems (subways, buses, ferries) that don't have traditional, airport-style checkpoints.