An F-22 Raptor takes on fuel from a KC-135 Stratotanker during the Red Flag exercise at Nellis Air Force Base, Nev., in February 2007. The Raptors, from the 1st Fighter Wing at Langley Air Force Base, Va., took part in Red Flag for the first time. Red Flag trains U.S. and allied aircrews in an extremely realistic combat environment. (Photo courtesy Paul Ridgway)