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Sad Details of Alaska Helicopter Crash Killing Five Passengers

The helicopter carrying Czech billionaire Petr Kellner, 56, just missed clearing an Alaskan ridge by three to five metres when it crashed, preliminary investigations show.

Mr Kellner, who is worth an estimated US$17.5 billion (A$23 billion) according to Forbes, was one of five passengers on board the fatal flight on Saturday (local time).