A civilian crew chief signals the Air Evac Lifeteam 34 team for takeoff at Sheppard Air Force Base, Texas, Aug. 3, 2016. Airmen from both the 82nd Civil Engineer Squadron fire department and 82nd Medical Group listen to Chris Whitmus, an Air Evac Lifeteam 34 pilot, as he trains them in preparation for Sheppard’s 75th anniversary air show celebration. (U.S. Air Force photo by Senior Airman Kyle E. Gese/Released)