New mobile app helps rescue four people from blizzard in Scotland

The app divides up the globe into three-metre squares and gives each specific location three random words.

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    Four people were rescued from a blizzard on Scotland's highest mountain earlier this week - thanks to a free mobile phone app.

    It is called What 3 Words - a new system to identify people's exact locations.

    Al Jazeera's Jessica Baldwin reports from Pembury, England.


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