Rescuers are racing against time to find a missing submersible with five passengers on board that set out Sunday morning on a tourist voyage to view the Titanic. Coast Guard officials say contact with the sub was lost about an hour and 45 minutes into the dive and time is of the essence as the vessel only holds a total of 96 hours of oxygen. US Coast Guard Northeast crews are searching for the vessel in 13,000 feet deep waters in a challenging remote area. Dan provided the latest information.