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Cryptologic History

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"On This Date in Cryptologic History" Calendar

2015: President Obama visited NSA to thank the workforce.

Thursday, September 11, 2025

President Obama visited NSA #OTD in 2015 to thank the workforce for their ongoing support in defense of the nation. Photo: NSA

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Check out the Cryptologic Bytes Archives for a wide variety of articles on all topics related to cryptology, codes and ciphers, related publications, Museums, and more.