The families of five people missing in a submarine that vanished near the wreck of the Titanic have been handed a grim deadline of 10am on Thursday for rescuers to find their lost loved ones alive in the depths of the Atlantic Ocean.
A frantic search for the OceanGate Expeditions submarine became an increasingly desperate race against time as it entered its second day on Tuesday, as officials said those on board would have already used more than half of their 96-hour oxygen supply.
