EXERCISE EFFORT Japan Air Self-Defense Force Tech. Sgt. Kenioki Sakamoto, left, and Tech. Sgt. Hiroshi Saito, both assigned to Tsuiki Air Base, Japan, prepare an F-2 fighter aircraft for a mission during exercise Cope North on Andersen Air Force Base, Guam, Feb. 9, 2010. The U.S. Air Force and the Japan Air Self-Defense Force conduct Cope North annually on Andersen to increase combat readiness and interoperability. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 903822-X-FXL18-344.jpg Photo Gallery