What did the declassified documents reveal?

US Intelligence on China and North Vietnam's Capabilities to Track OXCART Missions. This is a declassified CIA record, released through The Black Vault. The document is a Memorandum to the United States Intelligence Board, dated September 22, 1967. The Memorandum was released under the Freedom of Information Act, with no specific case number provided. It was declassified by the CIA on an unspecified date. The document is a Memorandum from the United States Intelligence Board, addressed to the United States Intelligence Board. It is marked as Special Limited Distribution and is 1 page in length. The Memorandum states that General Carter reported to the Board on the subject of increased Chinese Communist and North Vietnamese capabilities to track OXCART missions. According to the Memorandum, the Chinese Communist Air Surveillance Facilities have continued to improve their ability to track OXCART missions over North Vietnam since the program began on May 31, 1967. On the last mission of September 17, DRV Air Surveillance Facilities and two DRV SAM sites tracked the aircraft for the first time. However, the SAM sites were unsuccessful in their search using the FAN SONG radar. On September 18, SIGINT detected a practice tracking exercise in the Hsian Air Defense District of Far West China, simulating an OXCART mission from the northern Burma border to Lop Nor, Shuang-Cheng-Tzu, Lanchou, and back to the original point on the Burmese border. Similar simulated tracking of U-2 flights have been seen since the beginning of that program over China. The Memorandum concludes that we can anticipate continued improvement in the tracking capability of both the Chinese Communists and the DRV against the OXCART aircraft, with the consequent threat from SAM facilities. The United States Intelligence Board's Memorandum on this subject was approved for release on an unspecified date. This is what the public record looks like at its most ordinary. For more information, visit storyflo.com. The canonical URL for this document is https://archive.org/download/us-china-intel-CI01832/CI01832djvu.txt.

Why was this case declassified?

This material entered the public record through the U.S. declassification and Freedom of Information Act (FOIA) process. The originating source document is linked on this page so the citation chain is auditable.

CIA Us Intelligence On China And North Vietnam's Capabilities To Track Oxcart

◆ BLUF — The short version

US Intelligence on China and North Vietnam's Capabilities to Track OXCART Missions. This is a declassified CIA record, released through The Black Vault. The document is a Memorandum to the United States Intelligence Board, dated September 22, 1967. The Memorandum was released under the Freedom of Information Act, with no specific case number provided.

Date: AUG 14 · 2026
Release: Declassified · U.S. public record (FOIA)
Source document: View the primary source document

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What was CIA Us Intelligence On China And North Vietnam's Capabilities To Track Oxcart about?: US Intelligence on China and North Vietnam's Capabilities to Track OXCART Missions. This is a declassified CIA record, released through The Black Vault. The document is a Memorandum to the United States Intelligence Board, dated September 22, 1967. The Memorandum was released under the Freedom of Information Act, with no specific case number provided.
Why was this case declassified?: This material entered the public record through the U.S. declassification and Freedom of Information Act (FOIA) process. Storyflo narrates it directly from the public release.

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CIA Us Intelligence On China And North Vietnam's Capabilities To Track Oxcart

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