Facebook Finds Evidence of Political Interference Campaign 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 Facebook CEO Mark Zuckerberg takes a seat as he arrives to testify before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington, Tuesday, April 10, 2018. ( AP Photo/Carolyn Kaster ) Produced by Sarah McAdon Hosted by Tanzina Vega Produced by PRI and WNYC