Wing Walker
U.S. Air Force Senior Master Sergeant Cecil Martin of the Missouri Air National Guard, 131st Fighter Wing inspects an F-15 Eagle after a Sentry Eagle 2007 mission at Kingsley Field, Oregon. Sentry Eagle, the Air National Guard's largest air-to-air exercise, provides active, Guard, and Reserve pilots a forum to test their flying skills, including basic fighter maneuvers and air combat tactics against different types of aircraft. (U.S. Air Force photo by Technical Sergeant Adrian Cadiz)