Senators Grill NSA Chief on Surveillance

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NSA Chief: No Order to Disrupt Russian Threats

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NSA Chief Talks to Skeptical Hackers Conference

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NSA chief under fire: Adm. Rogers to step down?

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NSA chief: Trump has not given increased authority to take on Russians in cyberspace

(2:39)

NSA Chief: I Was Never Directed to Act Illegally

(3:16)

NSA Chief: I Was Never Directed to Act Illegally

(2:23)

NSA chief: New blind spots in tracking terrorists

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NSA chief: France warned about Russia hacking

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NSA chief General Keith Alexander heckled at hacker conference in Las Vegas

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NSA chief defends US spying programme

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Eavesdropper 'spies' on ex-NSA chief

(2:43)

NSA Chief: We Watched Russians Hack French Elections

(1:41)

NSA director defends surveillance

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Former NSA director weighs in on surveillance programs

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Sen. Angus King Gets 'Contentious' With NSA Chief Rogers

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NSA chief: Trump hasn't told me to confront Russian cyber threat

(6:42)

NSA chief says surveillance stopped attacks

(2:39)

NSA chief defends organisation at centre of spy row saying it acts within the law

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NSA Chief Comes Clean | HPL

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