U.S. Air Force Staff Sgt. Andrea Huffstetler, 509th Medical Operations Squadron aerospace medicine technician, treats a simulated aircraft accident victim during a major accident response exercise May 20, 2015, at Whiteman Air Force Base, Mo. For injuries such as amputations, the first step is to control the bleeding. (U.S. Air Force photo by Staff Sgt. Brigitte N. Brantley/Released)