Facebook, Twitter CEOs testify on content moderation practices

Mark Zuckerberg and Jack Dorsey were back on Capitol Hill on Tuesday, where they faced questions from lawmakers about their role in the 2020 presidential election. CBS News' Debra Alfarone has the latest on the hearing. Then, CEO of the Center for Countering Digital Hate, Imran Ahmed, joined CBSN to discuss why Facebook and Twitter are facing criticism for how they moderated content.