THE DOCUMENT
CIA-UAP-003, “The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954-1974”, by Gregory W. Pedlow and Donald E. Welzenbach, a CIA History Staff monograph from the U.S. Department of War’s PURSUE Release 03, published at war.gov/ufo, cleared 12 June 2026. It is a long internal history of two reconnaissance aircraft programmes; the UAP-relevant material is a short passage within it.
Why this one is worth your time
This is not a UFO document. It is an in-house CIA history of two spy planes, the U-2 and its successor the OXCART (the A-12), running to hundreds of pages on engineering, politics and operations. Buried in it is one short, specific passage that has been cited for years in the UFO literature: the claim, made by the CIA’s own historians, that a large share of the UFO reports of the late 1950s and 1960s were sightings of these high-flying aircraft, and that Air Force Blue Book investigators routinely checked reports against U-2 flight logs. This briefing sets out exactly what that passage says, and where it stops.
What the document says
The relevant material is a single titled section, “U-2s, UFOs, and Operation BLUE BOOK”. It makes a connected set of claims about why the new aircraft generated sightings and how the Air Force handled them.
Why high-altitude flights produced reports. The history records that high-altitude testing of the U-2 led to what it calls an unexpected side effect: a large increase in UFO reports. It explains the mechanism in physical terms. In the mid-1950s, the document states, most commercial airliners flew between 10,000 and 20,000 feet and military aircraft below 40,000 feet, so once U-2s began flying above 60,000 feet, air-traffic controllers began receiving more UFO reports. It describes the visual effect in detail: in the early evening, after the sun had set for an airliner at lower altitude, a U-2 far higher up was still in sunlight, and its silver wings would catch and reflect the sun and appear to the airliner pilot below as a fiery object. The document adds that at the time no one believed manned flight above 60,000 feet was possible, so no one expected to see an object so high.
How the Air Force handled the reports. The history records that pilots and ground observers reported these sightings to air-traffic controllers and wrote to the Air Force unit at Wright Air Development Command in Dayton charged with investigating such phenomena, which it links to the Air Force’s Operation BLUE BOOK, based at Wright-Patterson. It states that Blue Book investigators attempted to explain such sightings by linking them to natural phenomena, and that they regularly called on the Agency’s Project Staff in Washington to check reported sightings against U-2 flight logs. According to the document, this enabled investigators to eliminate the majority of the reports, although they could not tell the people who had written in the true cause.
The share attributed to the aircraft. The document states that U-2 and later OXCART flights accounted for more than one-half of all UFO reports during the late 1950s and most of the 1960s.
What the document does not say
It does not say that all UFO reports of the period had this cause. Its own claim is bounded: more than half of the reports during a stated window, leaving a remainder it does not characterise.
It does not give the underlying figures, the case-by-case matching, or the Blue Book records behind the “more than one-half” estimate. The claim is stated as a summary judgement of the CIA’s historians; the document does not reproduce the flight-log comparisons it describes.
It is an internal history written after the fact, not a contemporaneous case file. It describes how investigators worked, in the authors’ account, rather than presenting the original sighting reports or flight logs themselves.
The text is a declassified, sanitised history; footnotes point to a classified internal source (“OSA History”), and the passage is a summary rather than the primary records it summarises.
From the record
U-2s, UFOs, AND OPERATION BLUE BOOK CIA-UAP-003, the title of the relevant section
High-altitude testing of the U-2 soon led to an unexpected side effect-a tremendous increase in reports of unidentified flying objects CIA-UAP-003, opening the section (the line break between “side” and “effect” is joined here; the dash is as printed)
U-2 and later OXCART flights accounted for more than one-half of all UFO reports CIA-UAP-003, the section’s summary claim (the original runs on: “during the late 1950s and most of the 1960s”)
Note on quotes: the quoted lines are byte-faithful to the released text. Where a quote crosses a printed line break, the break is joined with a single space and no characters are changed; the trailing clause noted in the third attribution carries an OCR artifact in the year and is therefore paraphrased rather than quoted.
Where the case connects
This passage names Project BLUE BOOK directly and describes how Blue Book investigators worked, which connects it to Briefing R3-07 on Blue Book Special Report No. 14 and to the wider Blue Book material. It also names the same investigative chain (Wright-Patterson, the Air Technical Intelligence Center lineage) that the Robertson Panel reviewed in 1953, covered in Briefing R3-06. The document sits among the other 1950s-60s CIA UFO files in PURSUE Release 03.
The file also leaves its own loose ends. The “more than one-half” figure is asserted without the underlying tallies; the flight-log comparisons it describes are not reproduced; and the remainder of reports not attributed to the aircraft is left uncharacterised. Any later tranche that releases the Blue Book flight-log correlations, the classified “OSA History” source, or the case files behind the estimate lands in this series when it does.
Read it yourself
CIA-UAP-003, “The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954-1974”, is hosted at war.gov in PURSUE Release 03.
Read the file. Decide for yourself.
References and further reading
- CIA-UAP-003, “The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954-1974”, Gregory W. Pedlow and Donald E. Welzenbach, PURSUE Release 03, U.S. Department of War, hosted at war.gov/ufo
- Presidential Unsealing and Reporting System for UAP Encounters (PURSUE), U.S. Department of War, war.gov/ufo
- AARO UAP Records, All-domain Anomaly Resolution Office, aaro.mil/UAP-Records
- Signals from the Periphery, Briefing R3-07, on Blue Book Special Report No. 14
- Signals from the Periphery, Briefing R3-06, on the Robertson Panel