Airman 1st Class Dalton Sanger, 361st Training Squadron aerospace propulsion apprentice course student, performs a prop control change at Sheppard Air Force Base, Texas, April 3, 2019. Sanger is safety wiring the prop control now, which is usually one of the last steps. The little safety wires are one of the most used tools in aerospace propulsion as they hold pretty much the whole plane together. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)