This week, Clay Jenkinson’s interview with David Nicandri in the aftermath of the disaster of the submersible Titan in the north Atlantic. Nicandi reflects on the spirit of exploration, the risks taken by those who would go where no man has gone before. Were the five men who died when the submersible imploded just billionaire tourists or adventurers in the spirit of Lewis and Clark and Captain James Cook? How can we make sense of the continuing lure of the Titanic? Where does undersea tourism go from here?