U.S. Army Reserve Staff Sgt. Jeff Harley, petroleum

U.S. Army Reserve Staff Sgt. Jeff Harley, petroleum supply specialist, 842nd Quartermaster Company, adjusts a traversing and elevation mechanism on an M2 machine gun in preparation for sending the first rounds downrange for weapons qualification during Operation Cold Steel II, hosted by the 79th Theater Sustainment Command at Fort Hunter Liggett, Calif., Oct. 15, 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 photo by Sgt. Heather Doppke/79th Theater Sustainment Command)