Zuckerberg reveals Facebook 'working' with Mueller investigation as countering Russian interference is 'an arms race'

Mark Zuckerberg has revealed Facebook has been cooperating with the special prosecutor’s investigation into Moscow’s alleged election meddling, as he claimed countering Russian interference was “an arms race”.

Appearing before politicians on Capitol Hill for the first of two days of testimony, the Facebook CEO said the company he established in 2004 was seeking to undergo a “philosophical change” amid recent controversy over the inappropriate use of people’s data, even as he sought to shape any pending regulation.

Indeed, on a day that bore with it potentially huge implications for a $80bn company and its 33-year-old chief, Mr Zuckerberg seemed largely untroubled by the questions he encountered. Many commentators on social media suggested most of the senators questioning the Harvard drop-out, did no more than confirm how little they knew about the subject.