191208-M-ZW066-2012 EL CENTRO, Calif. (Dec. 8, 2019) Hospital Corpsman 3rd Class James Madigan, a senior line corpsman with 2nd Battalion, 5th Marine Regiment, 1st Marine Division demonstrates the proper use of a tourniquet during exercise Steel Knight 20 (SK20) at Naval Air Facility El Centro, California, Dec. 8, 2019. SK20 increases the ability of all participants to plan, communicate and conduct operations against a capable near-peer adversary with a focus on major combat maneuvers and sustainment. (U.S. Marine Corps photo by Sgt. Alina Thackray/Released)