Danish maritime authorities work on a salvage operation, taking place in connection with a criminal investigation, south of the island of Amager close to Copenhagen, Denmark, Saturday, Aug. 12, 2017.  Danish prosecutors urged a judge on Saturday to hold in pre-trial detention the owner of an amateur-built submarine, suspected of being responsible for the disappearance of a Swedish woman who had been onboard the ship that later sank. The buoy marks where privately built and owned submarine UC3 Nautilus sank. (Brian Lindberg Jensen/Ritzau Foto via AP)