David Cleland and Staff Sgt. Nicholas Fasola, Keesler firefighters, remove their bunker gear after moving "victims" to the decontamination line during a hazardous material exercise, Sept. 27, 2012, at Keesler Air Force Base, Miss. In the scenario a routine delivery flatbed trailer transporting hazardous material is struck by a van transporting airmen causing one of the containers to fall from the vehicle and rupture. The exercise helped prepare first responders in the event of a real-world incident. (U.S. Air Force photo by Kemberly Groue/Released)