Support WBURThe missing submersible raises troubling questions for the adventure tourism industryPlay03:36Download AudioA MartínezBrian MannJune 22, 2023 ShareStockton Rush, left, CEO and co-founder of OceanGate, is shown in June 2013 during a dive in the company's submersible, "Antipodes," about three miles off the coast of Fort Lauderdale, Fla. (AP)