NELLIS AIR FORCE BASE, Nev. (ACCNS) -- An F-22 Raptor flys off the left wing of a KC-135 Stratotanker during the Red Flag Exercise Feb 7. Two KC-135 Stratotankers from the 319th Air Refueling Wing at Grand Forks Air Force Base make up the lead tanker unit during the exercise. Red Flag is an exercise designed to hone the warfighting skills of Air Force pilots for conflicts. (U.S. Air Force photo/1st Lt. Randi Norton)