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CLASSIC: The NSA: Fact, Fiction and Fright

Stuff They Don't Want You To Know

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What Is the Cypher Bureau?

Passo: The Cypher Bureau, working for the federal government, made a deal with private telegraph companies. In 1922, they had shifted from 1919-1922 from military intelligence to diplomatic intelligence. They intercepted Japanese communications that helped American diplomats negotiate with Japan on naval arms limitations. Henry Stimson closed the agency in 1929.

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