Backdraft
An Airman from the 4th Civil Engineer Squadron Fire Department drags a fire hose to a simulated burning aircraft during a live-fire exercise on Seymour Johnson Air Force Base, N.C., July 31, 2009. These exercises are easily controlled; if something goes wrong, the fire can be extinguished almost immediately by closing the shut-off valve. (U.S. Air Force photo by Airman 1st Class Rae Perry)