Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aeria…, 1955 — CIA File
This is the USAF Project Blue Book with a CIA cover sheet stating the document is "Official Record Copy." With the exception of the handwritten note on the first page, the content of this document has been available on CIA's public website.
Incident Overview
In 1955, in an undisclosed location, CIA preserved a documentary record that was declassified and published on June 12, 2026 as part of the third tranche of the Department of War’s Presidential Unsealing and Reporting System for UAP Encounters (PURSUE).
What the government released
This is the USAF Project Blue Book with a CIA cover sheet stating the document is “Official Record Copy.” With the exception of the handwritten note on the first page, the content of this document has been available on CIA’s public website.
The case in this archive
This is the primary source for Special Report No. 14, which is written up here at length with the report’s own figures: 3,201 cases frozen at the end of 1952, 474 of them — 21.5 per cent — left unknown, and a run of chi-square tests comparing the knowns against the unknowns on colour, number, shape, duration and speed. The case history is worth reading against the document, because the summaries of this study that have circulated since 1955 are not always faithful to the tables inside it.
Status of the case
Records released under the PURSUE program are designated unresolved by the All-domain Anomaly Resolution Office, which means the federal government has not concluded the events were anomalous, has not concluded they were conventional, and has not ruled out either possibility. Where AARO has offered a likely source for an item — an infrared sensor aboard a military aircraft, a commercial camera, or a known optical effect — that attribution is the agency’s working assessment rather than a final determination. Conventional candidates such as drones, balloons, flares, satellites, parallax and forced-perspective artifacts, and ordinary aircraft remain on the table for any unresolved case absent better data than a single sensor pass or a witness recollection.