Army Sgt. 1st Class Ervin Brewster, rear, assesses the shot grouping of Trent Skates, a Clemson University Reserve Officer Training Corps cadet, during a leadership exercise in Clemson, S.C., Oct. 24, 2015. Brewster is an Army Reserve drill sergeant assigned to the 98th Training Division's Company D, 1st Battalion, 518th Infantry Regiment, 2nd Brigade Combat Team. U.S. Army photo by Sgt. Ken Scar