Spectators watch an aerial demonstration by the U.S. Air Force Demonstration Squadron, the Thunderbirds, during the AirPower over Hampton Roads open house at Langley Air Force Base, Va., May 14, 2011. The Joint Base Langley-Eustis open house is a free three-day event featuring aerial demonstrations by modern and historical military aircraft and civilian performers. (U.S. Air Force photo by Senior Airman Antoinette Gibson) (RELEASED)