An activist wearing a Facebook CEO Mark Zuckerberg mask stands outside Portcullis House in Westminster as an international committee of parliamentarians met for a hearing on the impact of disinformation on democracy in London, Tuesday, Nov. 27, 2018. Lawmakers from nine countries grilled a Facebook executive who came in place of Zuckerberg on Tuesday as part of an international hearing at Britain’s parliament on disinformation and “fake news.” (AP Photo/Frank Augstein)