364th Training Squadron aircraft electrical & environmental apprentice course students work on an F-16 Fighting Falcon at Sheppard Air Force Base, Texas, Oct. 18, 2018. An international student is performing the part of the pilot, testing the controls and making sure the defog system works when it is activated from the pilot's seat. Meanwhile, his wingmen on the ground communicate with him and if anything does not work properly, they will correct the problem. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)