The Lacuna Project

lacuna (n.) a gap in a record where something should be

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Exhibit 377

Tonkin Gulf Intelligence 'Skewed' According to Official History and Intercepts (Electronic Briefing Book No. 132 update)

Exhibit 377 ยท Press release / briefing book

Tonkin Gulf Intelligence 'Skewed' According to Official History and Intercepts (Electronic Briefing Book No. 132 update)

the National Security Agency, today declassified over 140 formerly top secret documents -- histories, chronologies, signals intelligence [SIGINT] reports, and oral history interviews -- on the August 1964 Gulf of Tonkin incident.

Describes the 1 Dec 2005 NSA declassification of more than 140 Tonkin documents, the April 2004 FOIA request by Matthew Aid, and NSA officials' earlier resistance to release.

Source
National Security Archive, George Washington University
Date
1 December 2005
Quoted from
para 1
Grade
Reported
Document
https://nsarchive2.gwu.edu/NSAEBB/NSAEBB132/press20051201.htm
Accessed
2026-11-09
Cited by
Findings citing this exhibit
Note
Reported: an NGO's account. Dates and counts are replaced by the NSA release stamp on the Hanyok PDF and NSA's declassified-documents index (not reached).

Cited by

Finding DEF-2.2
Primary record Hanyok found that "The withheld information constituted nearly 90 percent of all available SIGINT" and that "only SIGINT that supported the claim that the communists had attacked the two destroyers was given to administration officials."