Man dies in 3rd shark attack off Australia island in 7 weeks

A shark has killed a man in an island harbor on Australia's Great Barrier Reef where two tourists were mauled on consecutive days in September in a spate of attacks that has left authorities struggling to explain an apparent escalation in danger in an internationally-renowned vacation destination.The 33-year-old victim was among 10 friends who set out from Airlie Beach on the Queensland state mainland on Monday morning on a rented yacht to sail themselves on a five-day cruise through the idyllic