https://www.reuters.com/article/us-facebook-ceo/facebook-to-overhaul-political-ads-after-threat-of-u-s-regulation-idUSKCN1BW2S9 >Facebook Inc on Thursday launched an overhaul of how it handles paid political advertisements, giving a concession to U.S. lawmakers who have threatened to regulate the world's largest social network over secretive ads that run during election campaigns.