James Cameron calls search for missing sub a 'nightmarish charade' and investigation into its implosion begins.

James Cameron, the director of Titanic, has criticized the search operation for a deep-sea tourist sub that turned into a "nightmarish charade" and prolonged the agony of the families of the passengers. The US Coast Guard confirmed that pieces belonging to the missing OceanGate submersible were discovered in a debris field near the wreckage of the Titanic. All five people aboard the submersible died when the vessel imploded. Cameron said that "one of the saddest aspects of this is how preventable it really was."