In a 2017 video posted to his company’s YouTube channel, OceanGate Expeditions’ CEO Stockton Rush, who perished along with four passengers on the ill-fated Titan submersible in mid-June, described the glue holding the vessel together by comparing it to a popular food. The 2017 video showed the submersible being put together as Rush asserted, “It’s pretty simple, but if we mess it up, there’s not a lot of room for recovery,” Then he added, “The glue’s very thick, so it’s not like Elmer’s Glue; it’s like peanut butter.” Rush had been warned years before the tragedy that his vessel was...