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Inside the CIA's museum of spycraft

At the Central Intelligence Agency's headquarters in Langley, Virginia, a newly-redesigned museum – accessible only to authorized persons – chronicles the successes, failures and sacrifices of intelligence operatives through the years. CBS News' Norah O'Donnell gets a private tour with CIA director William Burns and finds out how compromising human intelligence sources can put American security, and the lives of CIA agents, at-risk.

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