The U.S. Air Force Thunderbirds perform a delta burst

The U.S. Air Force Thunderbirds perform a delta burst during the 2014 Wings of Freedom Open House, Sept. 13, 2014. The U.S. Air Force Air Demonstration Squadron, better known as the Thunderbirds, performs precision aerial maneuvers demonstrating the capabilities of Air Force high performance aircraft to people throughout the world. The squadron exhibits the professional qualities the Air Force develops in the people who fly, maintain and support these aircraft. This is the first time Altus AFB has opened its gates to the public since 2012. (U.S. Air Force photo by Senior Airman Levin Boland/Released)