Chinese medium‑range ballistic missile deployment – State Department, Bureau of Intelligence and Research, Note 323, May third, nineteen sixty‑eight. This internal assessment is notable because it records the first U.S. intelligence estimate that the People’s Republic of China’s MRBM program had slipped behind its original schedule, and it links the delay to the upheavals of the Cultural Revolution. The note was declassified and made publicly available through The Black Vault archive. The release appears in the online collection of U.S. intelligence documents, with the full text hosted at archive dot org under the identifier CI01865. No specific FOIA case number is cited; the declassification authority is the originating bureau, the Bureau of Intelligence and Research. Now, the document itself. To: The Secretary Through: Director of Intelligence and Research From: INR – Thomas L. Hughes, M4 Subject: Chinese MRBM Deployment Delayed According to an estimate made in late nineteen sixty‑si