BOOM OPERATOR U.S. Air Force Master Sgt. Alvin Kuper refuels an F/A-18 Super Hornet during a refueling mission supporting Rim of the Pacific exercises over Joint Base Pearl Harbor-Hickam, Hawaii, July 8, 2010. Kuper, a KC-135 stratotanker boom operator, is assigned to the 465th Air Refueling Squadron, 507th Air Refueling Wing, out of Tinker Air Force Base, Okla. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 250529-G-AAU63-679.jpg Photo Gallery