U.S. Marines with B Company, 3rd Light Armored Reconnaissance Battalion, 1st Marine Division, hold a defensive position in light armored vehicles during exercise Steel Knight/Dawn Blitz 21 (SK/DB 21) at Marine Air Ground Combat Center, Twentynine Palms, California, Dec. 8, 2020. Exercise SK/DB 21 provides effective and intense training in an expeditionary environment to ensure 1st Marine Division remains lethal, combat-ready, interoperable, and deployable on short notice. (U.S. Marine Corps photo by Lance Cpl. Quince Bisard)