The Trojan Horsemen T-28 Warbirds Aerobatic Formation Demonstration Team stair step through the sky during the AirPower over Hampton Roads open house at Langley Air Force Base, Va., May 14, 2011. The 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/Senior Airman Zachary Wolf)(RELEASED)