Army Sgt. Robin Brown, center, stands above a group of Clemson University Reserve Officer Training Corps cadets as he teaches them how to operate a ground and airborne radio system during a leadership exercise in Clemson, S.C., Oct. 24, 2015. Brown 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