Tony Lightner, 553rd Commodities Maintenance Squadron composite fabricator, uses a jig and hand-held drill to create a hole in a jet engine shroud being modified at the Oklahoma City Air Logistics Complex, July 25, 2016, Tinker Air Force Base, Okla. The 553rd CMMXS manufactures and maintains components for KC-135, B-1B, B-52H, E-3 and E-6 aircraft. (U.S. Air Force photo/Greg L. Davis)