From left, Airman Taelor Sievers, Airman Cody Corn, Airman 1st Class Daniel Stebens and Airman 1st Class Hannah Cantrell, 361st Training Squadron aerospace propulsion apprentice course students, work on a F100 engine's fuel nozzle and manifold at Sheppard Air Force Base, Texas, Oct. 4, 2018. The students are torquing the fuel nozzle and manifold to ensure fuel is delivered properly. The F100 engine is usually used in F-15s and F-16s. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)