Missing Titanic sub: when it vanished and the race to find it

The Titan submersible, operated by OceanGate Expeditions to explore the wreckage of the sunken Titanic off the coast of Newfoundland, dives in an undated photograph. OceanGate Expeditions/Handout via REUTERS

(Reuters) -

Search teams are racing to find a tourist submersible with five people on board that vanished in the North Atlantic on its descent to the century-old wreck of the Titanic.