Combat controller trainees from the 720th Operations Support Squadron Advanced Skills Training flight rush to a waypoint away from "enemy" forces during a training exercise at a live-fire range on Eglin Air Force Base, Fla., Nov. 19, 2007. AST is the last phase of training for combat controllers and special tactics officers before they report to operational special tactics squadrons. (U.S. Air Force photo/Airman Matthew Loken)