A Canadian-Antiguan is dead and six other people are missing off the coast of Sicily, Italy, where the Bayesian, a luxury yacht, sank in a sudden and intense storm. Heidi Petracek reports on why the search and rescue mission is so dangerous for divers; the new footage of the storm that sank the superyacht; who else was on board; and the firsthand account of a man who helped rescue 15 people who made it out of the Bayesian.