Staff Sgt. Doug Delpha, 421st Combat Training Squadron contingency skills instructor at the U.S. Air Force Expeditionary Center, places a tourniquet on a wounded Marine during an exercise at the Enlisted Marine Professional Military Education course on Marine Corps Base Quantico, Va. Delpha led the medical portion of the exercise. He is the first non-Marine to graduate from Marine PME. (U.S. Air Force photo/Master Sgt. Bryant Roy)