Airman Edgar Avila, 57th Aircraft Maintenance Squadron Tomahawk Aircraft Maintenance Unit F-16 Fighting Falcon crew chief, performs a throttle control assembly at Nellis Air Force Base, Nev., Sept. 19, 2015. The throttle control assembly is just one of many objectives students of the advanced dedicated crew chief class will learn while attending the three-week course, which is hosted by Detachment 13, 372nd Training Squadron. (U.S. Air Force photo by Airman 1st Class Rachel Loftis)