An Air Force F-22 Raptor aircraft takes on fuel. An Air Force F-22 Raptor aircraft takes on fuel from a KC-10 Extender aircraft 26,000 feet above Eielson Air Force Base, Alaska, on April 17, 2008. The two aircraft and their crews are taking part in Exercise Red Flag - Alaska, a multinational exercise that provides realistic training for combat scenarios. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 092681-S-HCS86-703.jpg Photo Gallery