https://www.nsa.gov/portals/75/documents/news-features/declassified-documents/cryptologic-histories/cold_war_ii.pdf
May 4, 2025 — available at Hq INSCOM, Ft.. Belvoir, Va .. 35. CCH Seriea VI.CC.1.1. 36, USAFSS, "A History of the USA~ Airborne SIGlNT Reconnaialance ...