Facebook and Instagram parent company Meta Platforms Inc. said Thursday it will begin testing its crowd-sourced fact-checking program, Community Notes, on March 18. It will initially be based on a ratings system used by Elon Musk's X. Meta ended its fact-checking program in January. CEO Mark Zuckerberg said at the time that fact-checkers had become "politically biased," using some of the language that conservatives have long used to criticize his platforms. But media experts and those who study social media were aghast at Meta's policy shift. The decision "not only removes a valuable resource for users, but it also provides an air of legitimacy to a popular disinformation narrative: That fact-checking is politically biased.