Davos World Economic Forum explained - in 90 seconds

Business and global political leaders are heading for the Swiss ski resort of Davos for the 2015 World Economic Forum.

When it began in 1971, the Davos summit focused on European economic issues, but the agenda has grown to include wider global concerns.

BBC News outlines the history of the World Economic Forum - in 90 seconds.

Video produced by Michael Hirst

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