FILE - In this July 26, 1956 file photo, the Italian luxury liner Andrea Doria keels far over to starboard before sinking 225 feet to the bottom of the Atlantic 45 miles off Nantucket Island, Mass. Nearly six decades after the Andrea Doria slammed into another ocean liner, killing 46 people, explorers are preparing to do what 16 others have lost their lives attempting: get a fresh glimpse of the wreckage on the sea floor. Everett, Washington-based OceanGate will use a five-person submarine in June 2016 to get high-definition video and 3-D sonar images of the shipwreck. (AP Photo/John Rooney, File)