STRATOFORTRESS STRATOSPHERE A B-52 Stratofortress receives fuel from a KC-135 Stratotanker during the Rim of the Pacific exercise over the Pacific Ocean, July 10, 2010. The biennial, multinational exercise is designed to strengthen regional partnerships and improve interoperability. The B-52 is assigned to the 20th Bomb Squadron on Barksdale Air Force Base, La., and the KC-135 is assigned to the 465th Air Refueling Squadron on Tinker Air Force Base, Okla. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 332504-B-EHU44-054.jpg Photo Gallery