F-16 Fighting Falcon Aggressors of the 18th Aggressor Squadron, Eielson Air Force Base, Alaska, prepare to taxi during Cope North 2012, Andersen Air Force Base, Feb. 14, 2012. The U.S. Air Force, the Japan Air Self Defense Force and the Royal Australian Air Force began Cope North here Feb. 11. The exercise, which will run through Feb. 24, is the latest in a series of multinational exercises designed to enhance each country’s air operations. (U.S Air Force photo/Senior Airman Carlin Leslie)