By HOLLY RAMER, JENNIFER McDERMOTT and BEN FINLEY
BOSTON (AP) — About an hour and a half into its voyage, a missing submersible on an expedition to view the wreckage of the Titanic lost communications. It would take another eight hours before the Canadian research icebreaker Polar Prince, which was supporting the Titan, reported it missing to the Coast Guard and sparked an international search effort. The Coast Guard said Thursday the vessel imploded near the wreckage of the Titanic, killing all five people aboard. Officials say their listening devices didn’t detect the implosion, suggesting it happened before rescuers arrived. But questions remain about why there was such a time lag.