An F-22 Raptor waits to refuel August 11, 2010, Eielson Air Force Base, Alaska. The tanker mission was part of Red Flag-Alaska 10-4. RF-A exercises enables units to sharpen their combat skills by exchanging tactics, techniques, and procedures and improves interoperability. The tanker is a KC-135 Stratotanker assigned to the 168th Air Refueling Wing. (U.S. Air Force photo/Senior Airman Willard E. Grande II)