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.
“Midwest”11 pages
Evaluation TOTAL NORTH EAST CENTRAL EAST SOUTH EAST 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 205 137 342 9.2 6.1 15.3 7 1 8 18.4 2.6 21.1 44 30 74 9.3 6.3 15.6 1 0 1 4.0 0.0 4.0 1-Astronomical 328 228 556 14.7 10.2 24.9 4 3 7 10.5 7.9 18.4 73 29 102 15.4 6.1 21.5 5 1 6 20.0 4.0 24.0 2-Aircraft 272 210 482 12.2 9.4 21.6 3 5 8 7.9 13.2 21.1 76 57 133 16.0 12.0 28.0 6 2 8 24.0 8.0 32.0 3-Light Phenom. 29 20 49 1.3 0.9 2.2 1 1 2 2.6 2.6 5.3 4 6 10 0.8 1.3 2.1 1 1 2 4.0 4.0 8.0 4-Birds 11 8 19 0.5 0.4 0.9 0 0 0 0.0 0.0 0.0 3 0 3 0.6 0.0 0.6 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 2 6 8 0.1 0.3 0.4 0 0 0 0.0 0.0 0.0 0 3 3 0.0 0.6 0.6 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 226 0 226 10.1 0.0 10.1 3 0 3 7.9 0.0 7.9 43 0 43 9.1 0.0 9.1 2 0 2 8.0 0.0 8.0 7-Psychological 95 8 43 1.6 0.4 2.0 1 0 1 2.6 0.0 2.6 8 2 10 1.7 0.4 2.1 0 0 0 0.0 0.0 0.0 8-Unknown 418 0 418 18.7 0.0 18.7 9 0 9 23.7 0.0 23.7 81 0 81 17.1 0.0 17.1 4 0 4 16.0 0.0 16.0 9-Other 72 19 91 3.2 0.9 4.1 0 0 0 0.0 0.0 0.0 13 2 15 2.7 0.4 3.1 2 0 2 8.0 0.0 8.0 NORTH MIDWEST CENTRAL MIDWEST SOUTH MIDWEST Evaluation 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 0-Balloon 3 7 10 4.3 10.0 14.3 35 31 66 6.2 7.2 15.4 26 32 58 5.6 6.8 12.4 1-Astronomical 12 5 17 17.1 7.1 24.3 79 27 106 18.5 6.3 24.8 69 73 142 14.7 15.6 30.3 2-Aircraft 5 4 9 7.1 5.7 12.9 43 40 83 10.0 9.3 19.3 55 47 102 11.8 10.0 21.8 3-Light Phenom. 0 2 2 0.0 2.9 2.9 11 7 18 2.6 1.6 4.2 5 1 6 1.1 0.2 1.3 4-Birds 1 0 1 1.4 0.0 1.4 3 2 5 0.7 0.5 1.2 4 3 7 0.9 0.6 1.5 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. 8 0 8 11.4 0.0 11.4 58 0 58 13.6 0.0 13.6 44 0 44 9.4 0.0 9.4 7-Psychological 1 0 1 1.4 0.0 1.4 12 0 12 2.8 0.0 2.8 3 3 6 0.6 0.6 1.2 8-Unknown 20 0 20 28.6 0.0 28.6 65 0 65 15.2 0.0 15.2 90 0 90 19.2 0.0 19.2 9-Other 2 0 2 2.9 0.0 2.9 14 1 15 3.3 0.2 3.5 8 5 13 1.7 1.1 2.8 Total 52 18 70 74.3 25.1 100 320 108 428 44.8 25.2 100 304 164 468 650 350 100 NORTH WEST CENTRAL WEST SOUTH WEST Evaluation 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 0-Balloon 4 2 6 12.6 6.3 18.8 3 1 4 4.6 1.5 6.2 31 7 38 11.8 2.7 14.5 1-Astronomical 7 1 8 21.9 3.1 25.0 14 11 25 21.5 16.9 38.5 33 51 84 12.6 19.5 32.1 2-Aircraft 5 1 6 15.6 3.1 18.7 3 3 6 4.6 4.6 9.2 23 23 46 8.8 8.8 17.6 3-Light Phenom. 0 0 0 0.0 0.0 0.0 1 0 1 1.5 0.0 1.5 2 2 4 0.8 0.8 1.6 4-Birds 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.5 1.5 0 2 2 0.0 0.8 0.8 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 1 2 3 0.4 0.8 1.2 6-Insuffic. Info. 3 0 3 9.4 0.0 9.4 5 0 5 7.7 0.0 7.7 17 0 17 6.5 0.0 6.5 7-Psychological 2 0 2 6.3 0.0 6.3 4 0 4 6.2 0.0 6.2 0 0 0 0.0 0.0 0.0 8-Unknown 4 0 4 12.5 0.0 12.5 16 0 16 24.6 0.0 24.6 59 0 59 22.5 0.0 22.5 9-Other 3 0 3 9.4 0.0 9.4 3 0 3 4.6 0.0 4.6 4 5 9 1.5 1.9 3.4 Total 28 4 32 81.5 12.5 100. 49 16 65 95.4 24.6 100. 170 92 262 64.9 35.1 100. NORTH FARWEST CENTRAL FARWEST SOUTH FARWEST Evaluation 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 0-Balloon 15 3 18 13.9 2.8 16.7 17 11 28 11.6 7.5 19.1 19 12 31 16.1 10.2 26.3 1-Astronomical 11 10 21 10.2 9.3 19.5 15 6 21 10.3 4.1 14.4 6 11 17 5.1 9.3 14.4 2-Aircraft 13 9 22 12.0 8.3 20.3 26 13 39 17.8 8.9 24.7 14 6 20 11.9 5.1 17.0 3-Light Phenom. 0 0 0 0.0 0.0 0.0 1 0 1 0.7 0.0 0.7 3 0 3 2.5 0.0 2.5 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. 1 0 1 0.9 0.0 0.9 0 1 1 0.0 0.7 0.7 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 10 0 10 9.3 0.0 9.3 24 0 24 16.4 0.0 16.4 9 0 9 7.6 0.0 7.6 7-Psychological 0 0 0 0.0 0.0 0.0 1 2 3 0.7 1.4 2.1 3 1 4 2.5 0.8 3.3 8-Unknown 25 0 23 21.3 0.0 21.3 25 0 25 17.1 0.0 17.1 22 0 22 18.6 0.0 18.6 9-Other 13 0 13 12.0 0.0 12.0 2 2 4 1.4 1.4 2.8 8 4 12 6.8 3.4 10.2 Total 8.6 22 108 19.6 20.4 100. 111 35 146 76.0 24.0 100. 84 34 118 71.2 28.8 100.
FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.