A 364th Training Squadron cable and antenna systems apprentice course Airman in training adjusts a safety line as instructor Marine Sgt. Alex Shepley watches atop a 105-foot communications tower at Sheppard Air Force Base, Texas, Oct. 23, 2018. Students in block nine of course instruction are undergoing orientation training to help them get used to working high above to ground to install communication antennas. (U.S. Air Force photo by John Ingle)