Crews racing to find missing Titanic tourist submersible: ‘It would be a miracle if they’re recovered alive’

Time is running out to find the Titanic tourist submersible missing in the North Atlantic Ocean, with the U.S. Coast Guard saying the vessel could run out of oxygen on the morning of June 22. Mike Armstrong looks at the search efforts underway, the growing pessimism the watercraft will be found in time, and the people believed to on board.

• Missing Titanic submersible: Who are the 5 passengers on board?
• Race to find missing Titanic submersible has crews ‘working around the clock’