FILE - In this May 16, 2012, file photo, the Facebook logo is displayed on an iPad in Philadelphia. Facebook was the top non-television source for election news cited by supporters of both candidates, according to a survey by the Pew Research Center. The social media site's import as a driver of political news has been underscored by the lingering controversy of people using it to spread false news stories. (AP Photo/Matt Rourke, File)
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