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Lawmakers grill Mark Zuckerberg on political ads, election security

Facebook CEO Mark Zuckerberg appeared on Capitol Hill to testify about Libra, a new cryptocurrency co-founded by the social network. Lawmakers pressed Zuckerberg on a range of other topics, including fact-checking political ads, election security and misinformation. CNET senior producer Dan Patterson joins CBSN to discuss Zuckerberg's testimony.
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