U.S. Air Force Tech. Sgt. Kris Schools, a 50th Air Refueling Squadron (ARS) boom operator instructor adjusts the mounting hardware for the cargo roller wheels on a KC-135 Stratotanker aircraft at MacDill Air Force Base, Fla., April 9, 2021, prior to a 91st ARS deployment. The rollers are checked prior to cargo being loaded which provides a safe way for airmen to move cargo around the aircraft. (U.S. Air Force photo by Airman 1st Class David D. McLoney)