MysteriesKryptosArtifactsDavid Stein, "The Puzzle at CIA Headquarters: Cracking the Courtyard Crypto" (Studies in Intelligence, 1999)David Stein, "The Puzzle at CIA Headquarters: Cracking the Courtyard Crypto" (Studies in Intelligence, 1999): scan
Eleven pages, with redactions under exemptions (b)(1) and (b)(3), as posted in the National Security Archive's electronic briefing book 431.
Central Intelligence Agency (declassified release), 1999. Public domain
Copies 1
ScanCentral Intelligence Agency (declassified release) · nsarchive2.gwu.edu · Public domain (US government work)Primary source: The Puzzle at CIA Headquarters: Cracking the Courtyard Crypto1 step from the original
Where it was made
Courtyard of CIA headquarters, Langley · Building courtyard
Sources 1
Cite it
Mysteries Department. (2026). David Stein, "The Puzzle at CIA Headquarters: Cracking the Courtyard Crypto" (Studies in Intelligence, 1999): scan [Copy CPY0D7HTK1G72X9]. https://mysteriesdept.com/r/CPY0D7HTK1G72X9
@misc{mysteriesdept_art0d7htjsp0mda,
title = {David Stein, "The Puzzle at CIA Headquarters: Cracking the Courtyard Crypto" (Studies in Intelligence, 1999): scan},
author = {{Mysteries Department}},
year = {2026},
note = {Artifact, catalog key CPY0D7HTK1G72X9},
url = {https://mysteriesdept.com/r/CPY0D7HTK1G72X9}
}