MIAMI — Coast Guard crewmembers continue the search for Mark Polaschek, 49, who was reported missing after not returning to Manatee Bay Friday. Coast Guard Sector Key West, Fla., received a report of an overdue vessel late Friday evening after Polaschek failed to return. Polaschek went on a voyage aboard a 26-foot sailing vessel, Mrs Big, alone to an unknown location. After not returning at sunset,...