The desperate search for a missing submersible that vanished during a mission to explore the wreck of the Titanic continued on Tuesday as more information about those onboard came to light. The submersible, which is part of an OceanGate Expeditions tour that offers passengers a once-in-a-lifetime experience to explore the Titanic wreckage, went missing on Sunday after losing contact with the research vessel Polar Prince. British billionaire and owner of Action Aviation Hamish Harding was among the five people onboard the vessel, along with prominent Pakistani businessman, Shahzada Dawood, and his son, Suleman. The other two people onboard have yet...