Airman 1st Class Brian Sloppy (right) and Senior Airman Jimmy Aguilar open the turbofan engine cowling of a KC-135 Stratotanker at Royal Air Force Mildenhall, England, on July 26. The Airmen are crew chiefs with the 100th Aircraft Maintenance Squadron. They work 12-hour shifts to keep their fleet of 15 tankers flying. (U.S. Air Force photo/Master Sgt. Lance Cheung)