Airman 1st Class Rylee Johnson, left, and Senior Airman Enrique Yanez, 361st Training Squadron aerospace propulsion apprentice course students, look at their training objectives at Sheppard Air Force Base, Texas, July 18, 2019. Johnson and Yanez's objective for this day is to remove and re-install a T-56 turboprop engine's reduction gearbox, which helps the engine reduce the RPM to accommodate a propeller. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)