361st Training Squadron aerospace propulsion apprentice course students remove and install the augmenter and exhaust nozzle at Sheppard Air Force Base, Texas, April 3, 2019. The augmenter allows the engine to add at least 50% more thrust while the exhaust nozzle adjusts and regulates back pressure to control the aircraft's stall margins. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)