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Experts raised safety concerns about OceanGate years before its Titanic sub vanished

03:22

Rachel Treisman

Updated June 21, 2023

OceanGate uses its Titan vessel to take tourists deep below sea level to visit the Titanic shipwreck. It disappeared in the North Atlantic during one such trip on Sunday. (AP)

This article was originally published on June 21, 2023.

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