160411-N-AC887-002 DETROIT (April 11, 2016) Secretary of the Navy Ray Mabus looks as former U.S. Senator Carl M. Levin signs a graphic representation of the next Arleigh Burke class guided-missile destroyer, USS Carl M. Levin (DDG 120) at the GM Renaissance Center in Detroit. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)