U.S. Air Force Tech. Sgt. Matthew Harless, 633d Civil Engineer Squadron firefighter, talks to children about fire prevention and safety during a National Fire Week assembly at Bethel Manor Youth Center at Langley Air Force Base, Va., Oct. 13, 2011. Harless talked about practicing escape routes with their families and checking smoke detectors often to make sure they work. (U.S. Air Force photo by Staff Sgt. Jeff Nevison/Released)