All five people on board the missing submarine that was headed to the Titanic are no more. The US Coast Guard said they died from a catastrophic implosion of their vessel. Authorities came to that conclusion after examining debris found. At a briefing in Boston, Rear Admiral John Mauger said, “We immediately notified the families.” He added, “On behalf of the US Coast Guard and the entire unified command, I offer my deepest condolences.” Watch the video to know more.