Staff Sgt. Diana Jimenez, 362nd Training Squadron F-16 crew chief apprentice course instructor, gives a thumbs up inside an F-16 Fighting Falcon aircraft at Sheppard Air Force Base, Texas, July 2, 2019. Jimenez is performing a lights operations check. She will use the controls in the flightdeck while students will go around the F-16 and see if the lights are responding correctly. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)