171213-F-VG386-1063
U.S. Air Force Senior Airman Dakota David, 100th Maintenance Squadron hydraulic systems journeyman, works on the boom of a KC-135 Stratotanker during an isochronal inspection on RAF Mildenhall, England, Dec. 13, 2017. During an isochronal inspection of a KC-135, the boom is removed from the aircraft for a more thorough inspection. (U.S. Air Force photo by Airman 1st Class Luke Milano)