File-This Nov. 9, 2017, file photo shows Facebook CEO Mark Zuckerberg meeting with a group of entrepreneurs and innovators during a round-table discussion at Cortex Innovation Community technology hub  in St. Louis. 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 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/Jeff Roberson, File)