361st TRS aerospace propulsion apprentice course
Airman 1st Class Edward Korona, 361st Training Squadron aerospace propulsion apprentice course student, tightens bolts on a turbine at Sheppard Air Force Base, Texas, Feb. 2, 2018. The turbine transfers the torque to the front of the engine powering the propeller. Korona is in the ninth and final block of instruction and is scheduled to graduate Feb. 21. (U.S. Air Force photo by Alan R. Quevy)

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Photo by: Alan R. Quevy |  VIRIN: 180202-F-WQ255-0007.JPG