BARRICADE DRILLS U.S. sailors aboard the aircraft carrier USS Kitty Hawk raise an aircraft barricade during flight deck drills in the Pacific Ocean, April 18, 2008. Aircraft barricades are used to help land damaged aircraft on the flight deck. The USS Kitty Hawk is conducting its last spring deployment training before being relieved by the nuclear-powered aircraft carrier USS George Washington later this summer. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 987045-O-TNA47-724.jpg Photo Gallery