A satellite image shows the wreck of the Costa Concordia off the island of Giglio, Italy, on Jan. 17, 2012. The luxury cruise ship ran aground on Jan. 13.
The Costa Concordia had more than 4,200 passengers and crew on board when it slammed into a reef Friday off the tiny Tuscan island of Giglio. At least 23 remained unaccounted for Wednesday, according to Reuters.
The captain in charge of the specialist divers searching the stricken vessel told NBC News that they need to blow four more holes in it to gain access to the bottom of the cruise ship.
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