100th MXS Airmen perform ISO inspection
U.S. Air Force Airman 1st Class Joshua Heffernan, left, 100th Maintenance Squadron aerospace propulsion apprentice from Syracuse, N.Y., and U.S. Air Force Airman 1st Class James Greer, 100th MXS aerospace propulsion journeyman from McAllister, Okla., work on a KC-135 Stratotanker engine during an isochronal inspection Aug. 14, 2014, on RAF Mildenhall, England. Aircraft undergo ISO inspections, which occur at set intervals for each plane, to ensure they are mission-ready and safe to fly. (U.S. Air Force photo/Airman 1st Class Dillon Johnston/Released)