Featured interview: Titanic diver Dik Barton

The world continues to be transfixed by the deep-sea drama taking place in the North Atlantic, where a submersible taking customers to the Titanic is missing. Yesterday banging sounds were detected by sonar devices during the search on Tuesday. Joining the show to discuss the rescue effort is Dik Barton, the former director of operations at RMS Titanic and the first British diver to see the wreckage. 

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