The firm behind President Trump's election campaign accused of harvesting Facebook data.The attorney general for Massachusetts is launching an investigation into Cambridge Analytica, after claims that details from 50 million profiles were gathered without the users' knowledge. Both Facebook and Cambridge Analytica deny any wrongdoing. Also: the British government reacts to Russia expelling twenty-three of their diplomats, and a campaign is launched to tackle the rubbish on Mount Everest.
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