Documents / FOIA release
This CIA-released copy of Project Blue Book Special Report No. 14 is dated 5 May 1955 and comes from the Air Technical Intelligence Center at Wright-Patterson Air Force Base. It is a statistical analysis of about 4,000 unidentified aerial object reports from 1947 through 1952, coded onto IBM punched cards with the help of a panel of scientists. The report concludes that such objects were highly unlikely to be technological developments beyond present-day scientific knowledge. It also found no valid evidence of physical matter.
“Gray”4 pages
Read from the scan by GLM-OCR; expect the odd misread word.
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 Evaluation 5 SECONDS AND LESS 6-10 SECONDS 11-30 SECONDS 31-60 SECONDS Number Per Cent Number Per Cent Number Per Cent Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 3 7 10 0.7 1.6 2.3 3 5 8 1.8 3.0 4.8 7 12 19 2.6 4.5 7.1 9 11 20 4.6 5.6 10.2 1-Astronomical 143 143 286 32.7 32.7 65.4 44 28 72 26.3 16.8 43.1 46 17 63 17.4 6.4 23.8 15 10 25 7.7 5.1 12.8 2-Aircraft 28 28 56 6.4 6.4 128 24 14 38 14.4 8.4 22.8 46 36 82 17.4 13.6 31.0 39 22 71 19.9 11.2 31.1 3-Light Phenom. 2 2 4 0.5 0.5 1.0 1 4 5 0.6 2.4 3.0 1 2 3 0.4 0.8 1.2 0 2 2 0.0 1.0 1.0 4-Birds 2 4 6 0.5 0.9 1.4 1 1 2 0.6 0.6 1.2 1 1 2 0.4 0.4 0.8 6 1 7 3.1 0.5 3.6 5-Clouds, Dust, etc. 1 1 2 0.2 0.2 0.4 0 0 0 0.0 0.0 0.0 0 2 2 0.0 0.8 0.8 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 19 0 19 4.3 0.0 4.3 9 0 9 5.4 0.0 5.4 16 0 16 6.0 0.0 6.0 13 0 13 6.6 0.0 6.6 7-Psychological 2 0 2 0.5 0.0 0.5 0 0 0 0.0 0.0 0.0 5 3 8 1.9 1.1 3.0 2 0 2 1.0 0.0 1.0 8-Unknown 39 0 39 8.9 0.0 8.9 31 0 31 18.6 0.0 18.6 56 0 56 21.1 0.0 21.0 61 0 61 31.1 0.0 31.1 9-Other 10 3 13 2.3 0.7 3.0 2 0 2 1.2 0.0 1.2 5 9 14 1.9 3.4 5.3 3 2 5 1.5 1.0 2.5 61 SECONDS-5 MINUTES 6-30 MINUTES OVER 30 MINUTES NOT STATED Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 65 43 108 12.8 8.5 21.3 82 58 140 15.6 11.0 26.6 42 12 54 16.9 4.8 21.7 59 32 91 6.9 3.8 10.7 1-Astronomical 11 16 27 2.2 3.1 5.3 43 17 60 8.2 3.2 11.4 37 17 54 14.9 6.8 21.7 137 93 230 16.1 10.9 27.0 2-Aircraft 77 61 138 15.2 12.0 27.2 43 63 106 8.2 12.0 20.2 13 15 28 5.2 6.0 11.2 84 49 133 9.9 5.8 15.7 3-Light Phenom. 7 4 11 1.4 0.8 2.2 15 6 21 2.8 1.1 3.9 1 2 3 0.4 0.8 1.2 5 2 7 0.6 0.2 0.8 4-Birds 1 0 1 0.2 0.0 0.2 0 1 1 0.0 0.2 0.2 3 0 3 1.2 0.0 1.2 5 2 7 0.6 0.2 0.8 5-Clouds, Dust, etc. 1 7 8 0.2 1.4 1.6 3 2 5 0.6 0.4 1.0 4 0 4 1.6 0.0 1.6 3 1 4 0.4 0.1 0.5 6-Insuffic. Info. 44 0 44 8.7 0.0 8.7 39 0 39 7.4 0.0 7.4 15 0 15 6.0 0.0 6.0 143 0 143 16.8 0.0 16.8 7-Psychological 5 4 9 1.0 0.8 1.8 11 0 11 2.1 0.0 2.1 5 1 6 2.0 0.4 2.4 8 2 10 0.9 0.2 1.1 8-Unknown 140 0 140 27.6 0.0 27.6 119 0 119 72.6 0.0 22.6 66 0 66 26.5 0.0 26.5 177 0 177 20.8 0.0 20.8 9-Other 19 3 22 3.7 0.6 4.3 16 9 25 3.0 1.7 4.7 13 3 3 5.2 1.2 6.4 44 6 50 5.2 0.7 5.9 5 SECONDS AND LESS 6-10 SECONDS 11-30 SECONDS 31-60 SECONDS Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 1 0 1 6.2 0.0 6.2 0 0 0 0.0 0.0 0.0 1-Astronomical 9 1 10 81.8 9.1 90.9 6 2 8 75.0 25.0 100.0 4 0 4 25.0 0.0 25.0 2 1 3 25.0 12.5 37.5 2-Aircraft 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 1 1 0.0 6.2 6.2 0 1 1 0.0 12.5 12.5 3-Light Phenom. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffice. Info. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 2 0 2 12.5 0.0 12.5 0 0 0 0.0 0.0 0.0 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 1 1 0.0 6.2 6.2 0 0 0 0.0 0.0 0.0 8-Unknown 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6 0 6 37.5 0.0 37.5 4 0 4 50.0 0.0 50.0 9-Other 1 0 1 9.1 0.0 9.1 0 0 0 0.0 0.0 0.0 1 0 1 6.2 0.0 6.2 0 0 0 0.0 0.0 0.0 Evaluation 61 SECONDS - 5 MINUTES 6-30 MINUTES OVER 30 MINUTES NOT STATED Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 2 0 2 20.0 0.0 20.0 0 0 0 0.0 0.0 0.0 4 0 4 6.8 0.0 6.8 1-Astronomical 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 11 4 15 18.6 6.8 25.4 2-Aircraft 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 2 0 2 3.4 0.0 3.4 3-Light Phenom. 1 0 1 10.0 0.0 10.0 0 0 0 0.0 0.0 0.0 1 0 1 1.7 0.0 1.7 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 2 0 2 20.0 0.0 20.0 3 0 3 60.0 0.0 60.0 7 0 7 11.9 0.0 11.9 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 1 4 5.1 1.7 6.8 8-Unknown 4 0 4 40.0 0.0 40.0 2 0 2 40.0 0.0 40.0 12 0 12 20.3 0.0 20.3 9-Other 1 0 1 10.0 0.0 10.0 0 0 0 0.0 0.0 0.0 14 0 19 23.7 0.0 23.7 </td
FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.