An Ohio real-estate investor is planning to take a two-person submersible down to Titanic-level depths to prove that the journey can be carried out safely following the Titan sub's implosion last year. The investor, Larry Connor, told The Wall Street Journal: "I want to show people worldwide that while the ocean is extremely powerful, it can be wonderful and enjoyable and really kind of life-changing if you go about it the right way." He's working with Patrick Lahey, a cofounder and the CEO of the submersible manufacturer Triton Submarines. They aim to show that such an expedition can be carried...