Investigation and Tragedy: The Story of Titan and Polar Prince

Investigators in Canada have boarded the support ship Polar Prince, which was used to launch the Titan submersible, to understand what caused the vessel's catastrophic implosion during a dive to the wreck of the Titanic, killing all five people on board. The Polar Prince was the Titan's support vessel and had towed the submersible out to the area in the North Atlantic where it carried out its dive. Canada announced on Friday that it was launching a safety investigation, and experts say officials will also look at the materials used to make the sub's outer walls.