Facebook Promises To Combat Divisiveness and Improve Privacy. Again. Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email In this April 11, 2018, file photo, Facebook CEO Mark Zuckerberg testifies before a House Energy and Commerce hearing on Capitol Hill in Washington. ( AP Photo ) Produced by Beenish Ahmed Hosted by Tanzina Vega Produced by GBH, PRX and WNYC Studios