Stratotanker Boom An Air Force maintainer inspects the boom of a KC-135 Stratotanker at Al Udeid Air Base, Qatar, June 7, 2017, before a flight supporting Operation Inherent Resolve. The maintainer is assigned to the 340th Aircraft Maintenance Unit. Air Force photo by Staff Sgt. Michael Battles SHARE: Download: Full Size (0.62 MB) Credit: Staff Sgt. Michael Battles VIRIN: 170606-F-MI569-1145C.JPG Photo Gallery