Last October, Facebook announced that it would not fact-check political ads. And that decision angered a lot of people: outside, but also inside the company. To talk about Facebook's policy, and the potential risks of such a decision ahead of the 2020 presidential election, we sit down with Yaël Eisenstat. She's a former CIA officer and national security advisor to Vice-President Joe Biden. And in 2018, she served as Facebook's Head of Global Elections Integrity Operations for six months.