Nate Derewecki, an advanced marksmanship instructor with PEO Soldier, instructs a paratrooper on using a thermal imaging scope at night during a four-day, advanced rifle marksmanship course, Jan. 10, 2013, at Fort Bragg, N.C. The paratrooper is assigned to the 82nd Airborne Division’s 1st Brigade Combat Team. U.S. Army photo by Sgt. Michael J. MacLeod.