Tributes pour in for Titanic sub victims.

Tributes pour in for the five people who are believed to be dead after the deep-sea submersible, Titan, suffered a "catastrophic implosion" during an expedition to explore the shipwrecked Titanic. The victims included Pakistani tycoon Shahzada Dawood and his 19-year-old son, Suleman, who was reportedly "terrified" of the dangerous expedition. French diver Paul-Henri Nargeolet, British businessman Hamish Harding, and OceanGate CEO Stockton Rush were also on board. Nargeolet, who had been on over 35 dives to the site, was affectionately referred to as "Mr. Titanic" due to his reputation as a veteran explorer of the famous shipwreck.