Cambridge Analytica is the most hotly debated agency of the year: The company promises to know voters better than their own family based on their Facebook profiles - and to target them in such a way that they spin their voting decisions. With a million-dollar budget from the Trump campaign and Breitbart chief Steve Bannon on the board, they've become the specter of politics in the social media age. Head of Analytics David Wilkinson gives the keynote, and the panel discusses: Can Facebook turn elections or is it just a marketing gimmick? How do we combat fake news? And how do we save democracy in times of the filter bubble?