A diving veteran broke down in tears today as he said the five passengers trapped inside the missing Titanic submersible will feel like they are being 'buried alive in a tin can'.
Search teams estimated the vital oxygen supply on board the Titan would end at 12.08pm, all but extinguishing hopes of a dramatic rescue, but the US Coast Guard insists they still hope to find the vessel - and those inside - deep in the Atlantic.
Today, Dr Michael Guillen, who became the first TV correspondent to visit the remains of the Titanic when he explored the wreckage on a Russian sub in 2000, spoke of his experience.
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