Students from the 366th Training Squadron water and fuels systems maintenance course, watch as one of their peers utilizes a pipe threading machine at Sheppard Air Force Base, Texas, July 25, 2018. Pipe threading machines are used in plumbing, mining, and industrial applications, and enable precise cutting and attachment of pipe fittings. (U.S. Air Force photo by Airman Madeleine E. Remillard)