U.S. Army Reserve Sgt. Ruben Cardenas(right), indirect fire infantryman, inspects the feed tray on an M249 light machine gun while Pfc. Luis Mong, chemical, biological, radiological and nuclear specialist, both with the 329th Chemical Company, observes as part of primary marksmanship instruction during Operation Cold Steel II, hosted by the 79th Theater Sustainment Command at Fort Hunter Liggett, Calif., Nov. 29, 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 as part of Ready Force X 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 Sgt. Heather Doppke/79th Theater Sustainment Command)