"Keen Sword 2010" U.S.-Japan joint military exercise

A U.S. Air Force B-52 Stratofortress flies in formation with Japan Air Self-Defense Force F-15J's and U.S. Air Force F-15's during the "Keen Sword 2010" U.S.-Japan joint military exercise in the Pacific Ocean east of Okinawa island, Japan, on December 10, 2010. UPI/Keizo Mori