Senior Airman Mark Hill and Staff Sgt. Laron Blackshear, members of the Air Force District of Washington CBRNE response force, perform a radiological survey to determine radiation levels around a simulated vehicle-borne radiation dispersal devise explosion scene April 1, 2009. This scenario allowed the team to detect how strong the radiation was, what type, and how far away personnel needed to be in order to be safe. (U.S. Air Force photo/ Senior Airman Renae Kleckner)