The U.S. Air Force Air Demonstration Squadron, Thunderbirds, demonstrate an Opposing Knife Edge Pass aerial maneuver at Langley Air Force Base, Va., May 14, 2011. The Thunderbirds headlined at Air Power over Hampton Roads open house and performed precision aerial maneuvers, demonstrating the capabilities of high performance aircraft to the Hampton Roads area. (U.S. Air Force photo by Senior Airman Jonathan Muller)(RELEASED)