U.S. Air Force Staff Sgt. Kyle Scritchfield, center, 9th Civil Engineer Squadron fire protection crew chief, guides other Beale firemen at an aircraft interior fire on a simulated aircraft at Beale Air Force Base, Calif., March 19, 2012. Beale firemen routinely utilize the aircraft simulation pit to train at combating aircraft fires. (U.S. Air Force photo by Staff Sgt. Robert M. Trujillo/Released)