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Facebook is "unquestionably making hate worse".
That's the scathing claim from whistleblower Frances Haugen, who's been giving evidence to UK politicians working on the country's Online Safety Bill.
It comes amid a fresh leak of internal documents from the social media giant.
Among the thousands of pages was an admission from the company, that parts of its platform are hardwired for spreading misinformation.
London correspondent Laura Makin Isherwood spoke to Susie Ferguson.