Army Staff Sgt. Hal Martin, left, and Sgt. 1st Class Walter Snow teach 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 and Snow are Army Reserve drill sergeants 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