Facebook Democracy: When venom goes viral (part 1)

Are the likes of Facebook friends with democracy? In its short existence, the social network has become so ubiquitous that Donald Trump's campaign spent more money there than on TV advertising. Now Facebook is looking to expand to China, raising questions over censorship and freedom of speech. We ask how several essentially US-owned digital giants have come to dominate the global media and news landscape. Has the internet of 2016 morphed into Big Brother?