Airman Kenneth Hale and Airman Austin Bellar, on steps, 361st Training Squadron aerospace propulsion apprentice course students, remove and install an augmenter and exhaust nozzle on a trainer engine at Sheppard Air Force Base, Texas, April 3, 2019. The augmenter increases the engines thrust by 50%, while the exhaust nozzle helps control and regulate the back pressure, decreasing stall margins. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)