A U.S. Navy acoustic system detected an "anomaly" on Sunday that was likely the fatal implosion of a private submersible vehicle carrying five people to tour the wreckage of the Titanic, according to a senior military official. Coast Guard officials said during a news conference Thursday that they've notified the families of the crew of the Titan, which had been missing for days, bringing a tragic end to a saga that included an urgent around-the-clock search and a worldwide vigil for the missing vessel. Despite an international search and rescue effort, the Associated Press is now reporting that the Navy...