A F-22 Raptor assigned to the 49th Fighter Squadron, prepares to depart Nellis Air Force Base, Nev., flight line for a training mission 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)
