Airmen from the 362nd Training Squadron aircraft fundamentals course set up aircraft maintenance stands alongside the wing of a KC-135 at Sheppard Air Force Base, Texas, July 18, 2018. The KC-135 is built to carry a crew and cargo; however, it is also built to carry more than 31,200 gallons of fuel. Because of these requirements, the landing gear of a KC-135 contains material equivalent to more than 100 automobile tires. (U.S. Air Force photo by Senior Airman Kevin Clites)