A massive search operation is underway to find a submersible with five people on board that went missing Sunday on a trip to view the wreckage of the Titanic.
Coast Guard officials estimate there is "about 40 hours of breathable air left."
Aboard are a British adventurer, a French diver, a Pakistani father and son and the founder of the company that operates the tour, according to social media posts, a family statement and sources.
The Titanic wreckage sits at the bottom of the ocean nearly 13,000 feet below the surface southeast of Newfoundland, Canada.
Source: CNN
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