Evidence: From the U.S. National Security Agency
NSA Headquarters
Fort George G. Meade, Maryland
In June 2003, in order to settle a Freedom of Information lawsuit, the National Security Agency released three recordings, their translations (in English), and three follow-up reports. It also re-released, with fewer redactions, a history written in 1981.
The following are descriptions of and links to these documents. The documents reside directly on the National Security Agency's website. (NSA has a web page on Liberty.)
- Recording One, Labeled 104 (WAV)Intercept of Israeli helicopter air-to-ground voice transmissions
1229Z - 1244Z (8 June 1967) on 141.86 MHz - English Translation of Recording One (PDF)
- Recording Two, Labeled 105 (WAV)Intercept of Israeli helicopter air-to-ground voice transmissions
1247Z - 1319Z (8 June 1967) on 141.86 MHz - English Translation of Recording Two (PDF)
- Recording Three, Labeled 130 (WAV)Intercept of Israeli helicopter air-to-ground voice transmissions
1307Z - 1311Z (8 June 1967) on 307.00 MHz - English Translation of Recording Three (PDF)
- Follow-up Report, 090831Z JUN 67 (PDF)
- Follow-up Report, 091422Z JUN 67 (PDF)
- "Aftermath of Israeli Attack on USS Liberty," 22 June 1967 (PDF)
- "Attack on a Sigint Collector, the U.S.S. Liberty," 1981 (PDF)
Written by William Gerhard and Henry W. Millington in 1981, this history detailed "the technical rationale for the Liberty mission, the particulars of the Israeli miscalculation, the details of the American communications failures, a narrative of the attack and of attempts to minimize the compromise of cryptologic materials, and the lessons to be learned from the event." In providing an answer for "the particulars of Israeli miscalculation," the authors detailed the official diplomatic positions of each government, and the explanation offered by Israel.