James Cameron says the Titan passengers probably knew the submersible was in trouble
James Cameron walks in Purmamarca, Argentina, earlier this month.He's compared the OceanGate submersible tragedy to that of the Titanic itself.Javier Corbalan/AP A "catastrophic pressure implosion" killed all five passengers aboard the Titan submersible, the U.S. Coast Guard said Thursday, somberly solving a mystery that had captivated the public all week.