Banging sounds have been heard during the search for the missing Titan submersible indicating "continued hope of survivors," according to an internal US government memo.
A massive search operation is underway to find the vessel with five people on board that went missing Monday on a trip to view the wreckage of the Titanic.
It's a race against time as the US Coast Guard says the vessel had "about 40 hours of breathable air left" during an update at 5 this morning.
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.
[Source: CNN]
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