Facebook needs 'rules of the road,' says Sen. Klobuchar

Facebook is at the center of a new firestorm, sparked by media reports that political data firm Cambridge Analytica, which worked for the Trump campaign, harvested private information from more than 50 million Facebook profiles -- and Facebook never told the users. John Yang talks to Sen. Amy Klobuchar, D-Minn., about calls for greater accountability from the tech giant.