Airman 1st Class Jeremiah Butler, 361st Training Squadron aerospace propulsion apprentice course student, removes safety wires from a F110 turbine engine at Sheppard Air Force Base, Texas, July 18, 2019. Butler is a native of St. Louis, Missouri and is attending technical training school at Sheppard AFB. In this block of training he is learning to remove and re-install the fuel nozzle section of the engine. The students complete these tasks over and over as it helps them understand the engine as well as teaches them to identify faults and discrepancies during an inspection. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)