U.S. planes seeded monsoon clouds over the Ho Chi Minh Trail from 1967 to 1972 in 2,602 sorties. The declassified record of Operation Popeye, year by year.
Archives
The Pentagon Papers: McNamara’s Vietnam Study, 1967–1969
A reference entry on the Pentagon Papers: McNamara’s 1967 tasking, Gelb’s 1969 report, the 1971 Supreme Court case and the full release in June of 2011.
Archives
NSA’s Declassified History of the Gulf of Tonkin Incidents
NSA’s declassified Gulf of Tonkin history found no second attack on Aug. 4, 1964, and that most signals intelligence was left out of official reports.