Tanker refuelling an F-16
A KC-135 Stratotanker refuels an F-16 Fighting Falcon during a past Northern Edge exercise. Northern Edge '08, a joint training exercise hosted by the Alaskan Command, kicks off May 5. This year's exercise will involve more than 120 Air Force, Army, Air National Guard, Navy and Marine aircraft. (U.S. Air Force photo by Master Sgt. Rob Wieland)