Keesler firefighters carry a wounded "victim" out of Gerrard Hall during a major accident response exercise, March 21, 2013, Keesler Air Force Base, Miss. The scenario involved a leaking propane tank explosion in a supply closet that set the building on fire and injured several airmen. Keesler holds exercises periodically to prepare airmen for real world emergencies. (U.S. Air Force photo by Kemberly Groue/Released)