From Spring, into a Long Winter's Night: The Czechoslovakian Crisis of 1968, Part Two
National Security Agency NSA report Unclassified
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Verbatim passages
David McManis, deputy chief of the Situation Room, was an NSAer… He had established a good rapport with national security advisor Walt Rostow, and together the two were convinced that an invasion was imminent. But, like others, they felt they did not have enough information to predict the date.
NSA-CRYPTOLOGIC-ALMANAC-SPRING-2, National Security Agency, 2003-02-28 · NSA's retrospective claim, in tension with Rostow's own recorded words of 24 July
Document metadata
| Reference | NSA-CRYPTOLOGIC-ALMANAC-SPRING-2 |
|---|---|
| Originating body | National Security Agency — Cryptologic Almanac 50th Anniversary Series |
| Date | 2003-02-28 |
| Document type | report |
| Classification | Unclassified |
| Archive | National Security Agency — declassified histories (US) |
| Provenance | An NSA retrospective claim, not contemporaneous evidence — it sits in tension with Rostow's own words at the 24 July Tuesday lunch. |
Information provenance
- reports (inferred) → FRUS 1964-68 v17 D72 — The NSA history makes a claim about what Rostow believed; the dated record of what he said is the FRUS document. These are not two independent sources on the same fact.