Missing Titanic tourist sub: Titan suffered ‘catastrophic implosion,’ killing 5 onboard

 Five people who were onboard a submersible that vanished Sunday during a trip to see the wreckage of the Titanic are believed to have died in a “catastrophic implosion” of the vessel, according to the U.S. Coast Guard.

The Titan, a 21-foot submersible owned by OceanGate Expeditions, lost contact with the ship that launched it about an hour and 45 minutes into a dive on Sunday. Since then, officials and commercial vessels from the U.S. and Canada have combed an area twice the size of Connecticut, looking for signs of the Titan.