Capt. Deborah Lichota, a clinical nurse assigned to the 624th Aeromedical Staging Squadron, Joint Base Pearl Harbor-Hickam, Hawaii, applies a make-shift tourniquet to a simulated casualty during Operation Joint Medic exercise at Nellis Air Force Base, Nev., March 27, 2015. The exercise forced medical professionals to treat patients with minimal resources in a high-stress environment. (U.S. Air Force photo by Tech. Sgt. Colleen Urban)