The U. S. Air Force Thunderbirds prepare to perform during the 2015 Dyess Big Country Airfest May 3, 2015, at Dyess Air Force Base, Texas. The airshow them was “Presenting America’s Airpower” and it was showcased by more than 10 aerial acts and more than 40 static displays. (U.S. Air Force photo by Senior Airman Peter Thompson/Released)