Documents / Case file
This CIA archives copy, released in 2026, holds Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects). The Air Technical Intelligence Center at Wright-Patterson Air Force Base issued it on 5 May 1955. The study reduced about 4,000 sighting reports from 1947 to 1952 to IBM punched cards, with 3,201 cases charted, and applied chi square tests to compare known and unknown sightings. It concludes that it is highly improbable the reports represent technological developments beyond present-day scientific knowledge.
From the source:Release of 2026-06-12 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.
I I INDEX OF TABLES I Page Table Al. Evaluation of All Sightings by Years 107 I Table AZ. Evaluation of Unit Sightings by Years 107 Table A3. Evaluation of Object Sightings by Years 108 I Table A4. Evaluation of All Sightings by Month of Year, All Years. 109 Table AS. Evaluation of All Sightings by Month of Year, 1947 110 I Table A6. Evaluation of All Sightings by Month of Year, 1948 111 Table A7. Evaluation of All Sightings by Month of Year, 1949 112 I Table A8. Evaluation of All Sightings by Month of Year, 1950 113 Table A9. Evaluation of All Sightings by Month of Year, 1951 114 I Table Al0. Evaluation of All Sightings by Month of Year, 1952 115 I Table Al 1. Evaluation of Unit Sightings by Month of Year, All Years 116 Table AlZ. Evaluation of Unit Sightings by Month of Year, 1947 117 I Table Al3. Evaluation of Unit Sightings by Month of Year, 1948 118 Table Al4. Evaluation of Unit Sightings by Month of Year, 1949 119 I Table Al 5. Evaluation of Unit Sightings by Month of Year, 1950 120 Table Al 6. Evaluation of Unit Sightings by Month of Year, 1951 121 I I Table Al 7. Evaluation of Unit Sightings by Month of Year, 1952 122 Table Al 8. Evaluation of Object Sightings by Month of Year, All Years 123 Table Al 9. Evaluation of Object Sightings by Month of Year, 1947 124 Table AZO. Evaluation of Object Sightings by Month of Year, 1948 125 Table AZl. Evaluation of Object Sightings by Month of Year, 1949· 126 Table AZZ. Evaluation of Object Sightings by Month of Year, 1950 127 Table A23. Evaluation of Object Sightings by Month of Year, 1951 128 I Table A24. Evaluation of Object Sightings by Month of Year, 1952 129 I Table A25. Evaluation of All Sightings by Sighting Reliability Groups, All Years 130 Table A26. Evaluation of All Sightings by Sighting Reliability Groups, 1947 130 I Table A27. Evaluation of All Sightings by Sighting Reliability Groups, 1948 130 Table A28. Evaluation of All Sightings by Sighting Reliability Groups, 1949 130 I Table A29. Evaluation of All Sightings by Sighting Reliability Groups, 1950 131 Table A30. Evaluation of All Sightings by Sighting Reliability Groups, 1951 131 I Table A31. Evaluation of All Sightings by Sighting Reliability Groups, 1952 131 Table A32. Evaluation of Unit Sightings by Sighting Reliability Groups, All Years 132 I Table A33. Evaluation of Unit Sightings by Sighting Reliability Groups, 1947 . 132 I I 97 I
Case file, from the pursue collection. The PDF is mirrored here; the original link is above. 312 pages are in the text index: search them above, or from the library's search.