Airman 1st Class Tony Mainer, a 364th Training Squadron cable and antenna systems apprentice Airman in training from Metter, Ga., rappels down a 105-foot communications tower during orientation training at Sheppard Air Force Base, Texas, Oct. 23, 2018. Airmen, Soldier, Sailors and Marines going through the course must learn how to function in high spaces to ensure communication lines stay open in all sorts of conditions. (U.S. Air Force photo by John Ingle)