BBC Science Editor Rebecca Morelle examines a 3D model of the doomed Titan submersible, that left all five passengers dead. Pieces from the sub, which imploded on a deep dive to the Titanic wreck ...

Debris from the Titan submersible, recovered from the ocean floor near the wreck of the Titanic, was unloaded from the ship Horizon Arctic at the Canadian Coast Guard pier in St. John's ...

FILE - Debris from the Titan submersible, recovered from the ocean floor near the wreck of the Titanic, is unloaded from the ship Horizon Arctic at the Canadian Coast Guard pier in St. John's ...