Time is running out to locate the submersible vessel that went missing Sunday, on a voyage to visit the wreckage of the Titanic. The U.S. Coast Guard estimates the five people aboard the vessel, known as the Titan, could run out of air by Thursday morning.

CBS Sunday Morning correspondent David Pogue was aboard the same vessel to take the same voyage last year. He says its interior is the size of a minivan, it's built with a combination of off-the-rack and highly technical components and it has a hatch that's bolted shut from the outside.

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