The U.S. Air Force Air Demonstration Squadron "Thunderbirds" fly in the "Diamond" formation during their acceptance performance for Gen. William Fraser, commander of Air Combat Command, at Nellis Air Force Base, Nev., March 10, 2011. The Thunderbirds will headline AirPower over Hampton Roads, Langley AFB's signature air show, May 13-15, 2011. (U.S. Air Force photo/Staff Sgt. Richard Rose, Jr.)