Senior Cybersecurity Advisor at the Department of Homeland Security Matthew Masterson testifies before the House Judiciary Committee hearing in 2019. He left his post on Friday.
Susan Walsh/AP
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Susan Walsh/AP
Senior Cybersecurity Advisor at the Department of Homeland Security Matthew Masterson testifies before the House Judiciary Committee hearing in 2019. He left his post on Friday.
Susan Walsh/AP
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Susan Walsh/AP