A U.S. Air Force F-22 Raptor aircraft executes a supersonic flyby over the flight deck of the Nimitz-class aircraft carrier USS John C. Stennis (CVN 74) while under way in the Gulf of Alaska June 22, 2009. Stennis is participating in Alaska?s largest military training exercise Northern Edge 2009, a joint exercise that focuses on detecting and tracking units at sea, in the air and on land. (DoD photo by Mass Communication Specialist 3rd Class Josue L. Escobosa, U.S. Navy/Released)