Army Staff Sgt. Hal Martin, foreground, teaches preliminary marksmanship to a group of Clemson University Reserve Officer Training Corps cadets during a leadership exercise in Clemson, S.C., Oct. 24, 2015. Martin 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