- Mark Zuckerberg grilled by Congress on the Cambridge Analytica data scandal
- British data company harvested personal information of around 87m Facebook users
- Mr Zuckerberg apologises for Facebook's failings
- Comment: Zuckerberg's apologies can't save Silicon Valley from regulation
- What we learned from Zuckerberg's grilling from Congress
- A second hearing will be held on Wednesday from 3pm BST
Mark Zuckerberg, the Facebook CEO, disclosed on Tuesday his company was "working with" special counsel Robert Mueller in the federal probe of Russian interference in the 2016 presidential campaign and likened his firm's attempts to tackle foreign election meddling to an "arms race".
The founder of...