"It's time to say bon voyage, " LulzSec wrote in a message posted at the time, without saying why it was discontinuing its activity.

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The vessel, the largest luxury ship in its time, struck an iceberg on its maiden voyage from Southampton to New York.

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In a statement, DETI said the project was on course to be opened as planned on 31 March 2012 in time for the 100-year anniversary of the Titanic's maiden voyage.

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