BARRICADES U.S. sailors aboard the aircraft carrier USS Kitty Hawk raise an aircraft barricade during flight deck drills, April 18, 2008. Aircraft barricades are used to help land damaged aircraft. Kitty Hawk is conducting its last spring deployment before being relieved by the nuclear-powered aircraft carrier USS George Washington later this summer. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 679956-R-POF82-493.jpg Photo Gallery