Master Sgt. Branden Van Matre, Detachment 13, 372nd Training Squadron F-16 Fighting Falcon crew chief instructor, teaches an advanced dedicated crew chief class on Nellis Air Force Base, Nev., Sept. 19, 2015. Students will learn many useful skills to utilize in their day-to-day jobs while attending the three-week class. (U.S. Air Force photo by Airman 1st Class Rachel Loftis)