LIVE COVERAGE: Facebook CEO Mark Zuckerberg testifies to House committee

Facebook CEO Mark Zuckerberg is back on Capitol Hill.A house hearing examining the company's privacy policies and the role Facebook played as Russians intervened in the 2016 election has begun. Zuckerberg testified for around five hours in a Senate hearing on Tuesday.In that hearing, Zuckerberg apologized several times for Facebook failures and disclosed that his company was "working with" special counsel Robert Mueller in the federal probe of Russian election interference. He also said Facebook