Facebook's Zuckerberg: 'Don't get upset, act'
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What Facebook's Mark Zuckerberg told the BBC

16 February 2017 Last updated at 22:32 GMT

Facebook founder Mark Zuckerberg spoke to the BBC's Kamal Ahmed off-camera.

He told him that fake news, polarised views and "filter bubbles" were damaging "common understanding".

Video produced by Alexi Peristianis