Airman 1st Class Megan Lundin, front, and Airman Damon Wilkie, 362nd Training Squadron aircraft fundamentals course students, practice starting a flightline generator at Sheppard Air Force Base, Texas, July 11, 2018. The generator they are operating provides enough electricity and air to run an aircraft's pressurizations systems and air conditioning compressors while starting an aircraft's jet engine, or servicing it. (U.S. Air Force photo by Senior Airman Kevin Clites)