The USS Abraham Lincoln, USS Kitty Hawk and USS Ronald Reagan carrier strike groups steam in formation during a joint photo exercise (PHOTOEX) in preparation for Valiant Shield 2006 on Sunday, June 18, 2006, in the Pacific Ocean. The PHOTOEX featured 14 ships as well as 17 aircraft from Air Force, Navy, and Marine Corp including a B2 bomber. The Kitty Hawk Carrier Strike Group is currently participating in Valiant Shield 2006, the largest joint exercise in recent history. Held in the Guam operating area beginning June 19-23, the exercise involves 28 Naval vessels including three carrier strike groups, more than 300 aircraft and more than 20,000 service members from the Navy, Air Force, Marine Corps, and Coast Guard. (AP Photo/U.S. Navy, Jarod Hodge)