FILE - In this May 16, 2012, file photo, the Facebook logo is displayed on an iPad in Philadelphia. Facebook is announcing its second major tweak to its algorithm this month, saying it will prioritize news based on users’ votes. The company said in a blog post and Facebook post from Facebook CEO Mark Zuckerberg Friday, Jan. 19, 2018, that it will survey users about how familiar they are with a news source and if they trust it. (AP Photo/Matt Rourke, File)