Mark Zuckerberg dodges tough questions in second day of congress hearing

Facebook CEO Mark Zuckerberg has endured a gruelling five-hour hearing before the US House of Representatives, facing tough questions about how the site protects user data, whether it is biased against certain users – and what, exactly, it is. The second day of questioning before the House Committee on Energy and Commerce proved more taxing for the 33-year-old than his testimony before two Senate committees on Tuesday. Representatives shot rapid-fire questions at the entrepreneur, and even interrupted his answers at several points. "While Facebook has certainly grown, I worry it has not matured," Representative Greg Walden said at the opening of the hearing on Wednesday. "I think it is time to ask whether Facebook may have moved too fast and broken too many things."