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.
INDEX OF TABLES (Continued) Table A34. Evaluation of Unit Sightings by Sighting Reliability Groups, 1948 . Table A35. Evaluation of Unit Sightings by Sighting Reliability Groups, 1949 Table A36. Evaluation of Unit Sightings by Sighting Reliability Groups, 1950 Table A37. Evaluation of Unit Sightings by Sighting Reliability Groups, 1951 Table A38. Evaluation of Unit Sightings by Sighting Reliability Groups, 1952 . Table A39. Evaluation of Object Sightings by Sighting Reliability Groups, All Years Table A40. Evaluation of Object Sightings by Sighting Reliability Groups, 1947 Table A41. Evaluation of Object Sightings by Sighting Reliability Groups, 1948 Table A42. Evaluation of Object Sightings by Sighting Reliability Groups, 1949 Table A43. Evaluation of Object Sightings by Sighting Reliability Groups, 1950 Table A44. Evaluation of Object Sightings by Sighting Reliability Groups, 1951 Table A45. Evaluation of Object Sightings by Sighting Reliability Groups, 1952 Table A46. Evaluation of All Sightings for All Years by Sighting Reliability Groups, Military Observers Table A47. Evaluation of All Sightings for All Years by Sighting Reliability Groups, Civilian Observers Table A48. Evaluation of All Sightings for 1947 by Sighting Reliability Groups, Military Observers Table A49. Evaluation of All Sightings for 1947 by Sighting Reliability Groups, Civilian Observers Table AS0. Evaluation of All Sightings for 1948 by Sighting Reliability Groups, Military Observers Table A51. Evaluation of All Sightings for 1948 by Sighting Reliability Groups, Civilian Observers Table A52. Evaluation of All Sightings for 1949 by Sighting Reliability Groups, Military Observers Table A53. Evaluation of All Sightings for 1949 by Sighting Reliability Groups, Civilian Observers Table A54. Evaluation of All Sightings for 1950 by Sighting Reliability Groups, Military Observers Table A55. Evaluation of All Sightings for 1950 by Sighting Reliability Groups, Civilian Observers Table A56. Evaluation of All Sightings for 1951 by Sighting Reliability Groups, Military Observers Table A57. Evaluation of All Sightings for 1951 by Sighting Reliability Groups, Civilian Observers Table ASS. Evaluation of All Sightings for 1952 by Sighting Reliability Groups, Military Observers 98 Page 132 132 133 133 133 134 134 134 134 135 135 135 136 136 136 136 137 137 137 137 138 138 138 138 139 I I I I I I I I I I I I I I I I I I I I I 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.