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Expert on concerns he raised about Titan sub

The U.S. Coast Guard confirmed Thursday that the five passengers aboard the Titan submersible have died. Officials located two debris fields near the wreckage of the Titanic and said the sub at some point imploded after it dove into the Atlantic Sunday. William Kohnen, president and CEO of the Hydrospace Group, which specializes in engineering pressure vessels for human occupancy, joined CBS News to discuss what this incident could mean for the future of deepwater expeditions.

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Search for missing sub running out of time

Search crews are still trying to locate the missing OceanGate sub believed to be thousands of feet beneath the surface of the ocean. Officials expect the deep-sea craft to run out of breathable oxygen at some point Thursday. The sub went missing on Sunday during an expedition to the Titanic's wreckage. Roxana Saberi has the latest on the search and Art Trembanis, a professor of marine science who has worked directly with OceanGate, joined CBS News to talk about the vessel and possible rescue options.

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