It's the Winter 1969 journal, and there Spring/Summer Journals, so I don't necessarily buy the April fools explanation: https://www.nsa.gov/news-features/decla

It's the Winter 1969 journal, and there Spring/Summer Journals, so I don't necessarily buy the April fools explanation: https://www.nsa.gov/news-features/declassified-documents/tech-journals/ https://www.nsa.gov/news-features/declassified-documents/tec... > Key to The Extraterrestrial Messages - Winter 1969 - Vol. XIV, No. 1 Additionally, that same link above also contains this from the Winter 1966 journal, "Communication with Extraterrestrial Intelligence": https://www.nsa.gov/Portals/70/documents/news-features/declassified-documents/tech-journals/communications-extraterrestrial-intelligence.pdf https://www.nsa.gov/Portals/70/documents/news-features/decla...