EMSI provided exercise support to DOE for this exercise. Exercise Diablo Bravo 2008 (DB 08) was a National Exercise Program Tier II nuclear weapons incident exercise sponsored by the NNSA. The primary exercise activity took place from July 28 to August 1, 2008, in Kitsap County, Washington. DB 08 involved a comprehensive interagency response at the federal, state, and local levels. Diablo Bravo was significant because it was the first inter-agency U.S. nuclear weapons incident exercise to test the response activities to a terrorist attack on nuclear weapons. It was also the first real-time deployment of response assets and the first exercise in which weapons were in DOE custody under the NRF. The scenario was also intended to drive interaction between all participating departments and agencies responding to the incident and to establish and coordinate a National Security Area (NSA).