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Experiencing War: Military Intel: The Inside Story (Stories from the Veterans History Project, Library of Congress)

Major William F. Friedman,  explains ciphering  machine to Louise Newkirk
[Major William F. Friedman, chief of the signal intelligence, explaining the principles of intricate ciphering machine to Louise Newkirk, at the War Department, Washington, D.C.], 1930 Aug. 16.

Underwood & Underwood

Fort Riley, Kansas. Man at decoding machine
Fort Riley, Kansas. Decoding a message
at the message center which was established by the Signal Corps during a field problem
, April 1942.

Jack Delano, photographer

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  May 15, 2006
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