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.
“Jet Propulsion Laboratory”1 page
I IINDEX OF TABLES (Continued) Table A83. Evaluation of All Sightings by Duration of Sighting, 1948 Table A84. Evaluation of All Sightings by Duration of Sighting, 1949 Table A85. Evaluation of All Sightings by Duration of Sighting, 1950 Table A86. Evaluation of All Sightings by Duration of Sighting, 1951 Table A87. Evaluation of All Sightings by Duration of Sighting, 1952 Taole ABB. Evaluation of Unit Sightings by Duration of Sighting, All Years Table A89. Evaluation of Unit Sightings by Duration of Sighting, 1947 Table A90. Evaluation of Unit Sightings by Duration of Sighting, 1948 Table A91. Evaluation of Unit Sightings by Duration of Sighting, 1949 Table A92. Evaluation of Unit Sightings by Duration of Sighting, 1950 Table A93. Evaluation of Unit Sightings by Duration of Sighting, 1951 Table A94. Evaluation of Unit Sightings by Duration of Sighting, 1952 Table A95. Evaluation of Object Sightings by Duration of Sighting, All Years. Table A 96. Evaluation of Object Sightings by Duration of Sighting, 1947 Table A 97. Evaluation of Object Sightings by Duration of Sighting, 1948 Table A 98. Evaluation of Object Sightings by Duration of Sighting, 1949 Table A99. Evaluation of Object Sightings by Duration of Sighting, 1950 Table Al00. Evaluation of Object Sightings by Duration of Sightings, 1951 Table Al0l. Evaluation of Object Sightings by Duration of Sighting, 1952 Table Al02. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Five Seconds or Less Table Al 03. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Six to Ten Seconds Table Al 04. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Eleven to Thirty Seconds . Table Al 05. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Thirty One to Sixty Seconds Table Al06. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Sixty One Seconds to Five Minutes . Table Al07. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Six to Thirty Minutes Table Al 08. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Over Thirty Minutes Table Al 09. Evaluation of All Sightings for All Years by Duration of Sighting for Months of Year, Duration Not Stated . 100 Page I154 • 154 I155 155 I156 157 I157 158 I158 159 I159 160 I161 161 I162 162 I163 163 164 I 165 I 166 I167 168 I 169 I170 I171 172 I I I I I
Case file, from the pursue collection. The PDF is mirrored here; the original link is under it. 312 pages are in the text index: search them above, or from the library's search.