Getty ImagesBillionaire Hamish Harding is reportedly one of the five people on board the Polar Prince, the missing submersible that was meant to take tourists down to see the Titanic’s shipwreck. Harding’s stepson, Brian Szasz, confirmed the news with posts asking for “thoughts and prayers” on social media.“Thoughts and prayers for my stepfather Hamish Harding as his Submarine has gone missing exploring Titanic,” Szasz wrote in a since-deleted post on Facebook. “Search and rescue mission is unde