Footage of French explorer Paul-Henri Nargeolet, one of passengers onboard

Paul-Henri Nargeolet, French explorer and director of underwater research at a company that owns the rights to the Titanic wreck, who is among the passengers onboard the submarine that went missing on trip to the wreckage, speaks during an interview in Paris, France, in this still image from an undated handout video obtained by Reuters on June 20, 2023. HarperCollins France/Handout via REUTERS