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Fmr. US CTO: 'what we're not hearing is more important than what we're hearing'

06:18

It’s Facebook CEO Mark Zuckerberg’s second day facing questions from lawmakers on the Hill, today testifying before the House Energy and Commerce Committee. Craig Melvin talks to former U.S. Chief Technology Officer, Aneesh Chopra and Facebook's former privacy and public policy advisor, Dipayan Ghosh.