Lt. Col. Joe Kunkel, assigned to the 525th Fighter Squadron, and Staff Sgt. Randall Woode, assigned to the 49th Aircraft Maintenance Squadron, perform a pre-flight check in a F-22A Raptor during Red Flag 10-2 at Nellis Air Force Base, Nev., Feb. 4, 2010. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise is conducted on the 15,000-square-mile Nevada Test and Training Range, north of Las Vegas.(U.S. Air Force photo by Airman 1st Class Brett Clashman/RELEASED)
