Petty Officer 3rd Class Emerson Marsh, a corpsman with the Afghan National Army 1st Brigade, 215th Corps, Security Force Assistance Advisor Team, checks an ANA medic‚ tourniquets while another medic sets down his patient during a tourniquet exercise in the En Route Medical Care class held at the DUSTOFF compound aboard Camp Dwyer, Helmand Province, Afghanistan. The class was taught by corpsmen and Army medevac medics. DUSTOFF is an Army medevac unit deployed here.