Europe’s largest tech event, the Web Summit, opens in Lisbon Europe’s largest tech event, the Web Summit, gets underway in Lisbon amid a backlash over their role in spreading "fake" news and how they use consumer data. Some 70,000 people are expected to take part in the four-day gathering, dubbed "the Davos for geeks", including speakers from leading global tech companies, politicians and start-ups hoping to attract attention from the over 1,500 investors who are scheduled to attend. IMAGES AND SOUNDBITES