U.S. Air Force Staff Sgt. Derek Dobbins, 633rd Civil Engineer Squadron firefighter, listens to radio commands during a major accident response exercise at Langley Air Force Base, Va., Oct. 19, 2012. The firefighters were the first on the scene to put out the simulated fire, search for and recover any casualties. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)