PACIFIC OCEAN, (June 18, 2006) â United States Navy, Air Force and Marine Corps aircraft fly in formation during a photo exercise (PHOTOEX) for Valiant Shield 2006. 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 June 19-23, the exercise involves 28 Naval vessels including three carrier strike groups. Nearly 300 aircraft and approximately 22,000 service members from the Navy, Air Force, Marine Corps, and Coast Guard are also participating in the exercise. Official U.S. Navy photo by Photographerâs Mate Airman Benjamin Dennis.