A U.S. Army Reserve Troop List Unit Soldier, 4th Expeditionary Sustainment Command out of San Antonio, inspects his battle buddy’s protective mask to ensure a proper sealed during Operation Cold Steel II at Fort Hunter Liggett, Calif., Oct. 19, 2017. Operation Cold Steel is the U.S. Army Reserve’s crew-served weapons qualification and validation exercise to ensure that America’s Army Reserve units and Soldiers are trained and ready to deploy on short-notice and bring combat-ready and lethal firepower in support of the Army and our joint partners anywhere in the world. (U.S. Army Reserve photo by Maj. Maryjane Falefa Porter, 364th Expeditionary Sustainment Command).