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Travelling abroad into the unknown can be a great adventure, which can turn into a nightmare for a family when a close relative goes missing without a trace.

British journalist Michael Dixon went missing during a trip to Costa Rica two years ago. Rajan Datar spoke to his brother, David, about the obstacles the family have faced as they continue to try and trace Michael.

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Watch Fast Track on the BBC World News channel on Saturdays at 0430, 1230 and 1930 GMT or Sundays at 1930 GMT.