The Titanic: A Personal Sub That Goes Missing

The submersible Titan went missing in the North Atlantic on Sunday. The crew of a polar prints research ship lost contact with the sub about an hour and 45 minutes later. It had less than 40 hours of breathable air as of Tuesday evening. CNN's John Defterios says he almost fell to his knees in the middle of the parking lot outside the capital after being stopped by police at a security checkpoint.