The five passengers on the missing submersible are, clockwise from left, Hamish Harding, a British businessman and adventurer; Shahzada Dawood and his son, Suleman, part of one of Pakistan’s richest families; Stockton Rush, founder and CEO of OceanGate, the company that operates the tours; and French explorer Paul-Henri Nargeolet. Photos: Action Aviation/Associated Press; Engro Corporation Limited/Reuters; Greg Gilbert/The Seattle Times/Associated Press; Joel Saget/Agence France-Presse/Getty Images