An 11th Civil Engineer Squadron firefighter takes off his personal protective equipment after exiting the flashover identification trainer Aug. 28, 2012 at Joint Base Andrews, Md. A flashover is the near-simultaneous ignition of most of the directly exposed combustible material in an enclosed area. The Flashover identification training teaches firefighters the life saving skill of recognizing the indicators of flashover. (U.S. Air Force Photo by Senior Airman Perry Aston)