STRATOFORTRESS CHECK A U.S. Air Force maintenance crew checks a B-52 Stratofortress aircraft after a mission to support exercise Cope North on Andersen Air Force Base, Guam, Feb. 15, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually at Andersen to increase combat readiness and interoperability. The aircraft is assigned to the 20th Expeditionary Bomb Squadron on Barksdale Air Force Base, La. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 966273-U-QTY92-549.jpg Photo Gallery