US Navy Dry Dock Construction at 'Groton Shipyard', Connecticut. ( If videi does not play or is removed, type name of video in YouTube video-box & video will re-appear ) Good video: USS Minnesota, VIRGINIA Class (SSGN) ; Land Attack Nuclear Submarine; && USS Pennsylvania; OHIO Class (SSBN); Ballistic Missile Nuclear Submarine List of good videos: US Navy Virginia Class, Land Attack Nuclear Submarine (SSGN)