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
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 Evaluation TOTAL NORTH AMERICA SOUTH AMERICA EUROPE 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 270 179 449 8.4 5.6 14.0 251 169 420 8.4 5.7 14.1 0 0 0 0.0 0.0 0.0 12 1 13 15.0 1.3 16.3 1-Astronomical 475 341 816 14.8 10.7 25.5 443 329 772 14.9 11.1 26.0 4 0 4 40.0 0.0 40.0 3 4 7 3.8 5.0 8.8 2-Aircraft 354 288 642 11.1 9.0 20.1 343 260 603 11.6 8.8 20.4 2 0 2 20.0 0.0 20.0 5 11 16 6.3 13.8 20.1 3-Light Phenom. 82 24 56 1.0 0.8 1.8 31 23 54 1.0 0.8 1.8 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.3 1.3 4-Birds 19 10 29 0.6 0.3 0.9 14 9 23 0.5 0.3 0.8 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.3 1.3 5-Clouds, Dust, etc. 12 13 25 0.4 0.4 0.8 9 13 22 0.3 0.4 0.7 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 298 0 298 9.3 0.0 9.3 271 0 271 9.1 0.0 9.1 2 0 2 20.0 0.0 20.0 16 0 16 20.0 0.0 20.0 7-Psychological 38 10 48 1.2 0.3 1.5 38 9 47 1.3 0.3 1.6 0 1 1 0.0 10.0 10.0 0 0 0 0.0 0.0 0.0 8-Unknown 689 0 689 21.5 0.0 21.5 638 0 638 21.5 0.0 21.5 1 0 1 10.0 0.0 10.0 14 0 14 17.5 0.0 17.5 9-Other 112 35 147 3.5 1.1 4.6 97 22 119 33 0.7 4.0 0 0 0 0.0 0.0 0.0 3 9 12 3.8 11.3 15.1 AERICA AERICA AUSTRALIA 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 7 8 15 6.1 7.0 13.1 0 1 1 0.0 4.0 4.0 1-Astronomical 18 7 25 15.7 6.1 21.8 7 1 8 28.0 4.0 32.0 2-Aircraft 4 10 14 3.5 8.7 12.2 0 7 7 0.0 28.0 28.0 3-Light Phenom. 1 0 1 0.9 0.0 0.9 0 0 0 0.0 0.0 0.0 4-Birds 5 0 5 4.3 0.0 4.3 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 3 0 3 2.6 0.0 2.6 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 4 0 4 3.5 0.0 3.5 5 0 5 20.0 0.0 20.0 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 8-Unknown 32 0 32 27.8 0.0 27.8 4 0 4 16.0 0.0 16.0 9-Other 12 4 16 10.4 3.5 13.9 0 0 0 0.0 0.0 0.0 TOTAL NORTH AMERICA SOUTH AMERICA EUROPE 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 228 150 378 6.9 5.9 148 214 143 357 9.0 6.0 15.0 0 0 0 0.0 0.0 0.0 7 1 8 10.9 1.6 12.5 1-Astronomical 382 256 638 15.0 10.0 25.0 359 246 605 15.1 10.4 25.5 2 0 2 25.0 0.0 25.0 3 4 7 4.7 6.3 11.0 2-Aircraft 292 235 527 11.4 9.2 20.6 281 21.3 494 11.9 9.0 20.9 2 0 2 25.0 0.0 25.0 5 8 13 7.8 12.5 20.3 3-Light Phenom. 32 21 53 1.3 0.8 2.1 31 20 51 1.3 0.8 2.1 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.6 1.6 4-Birds 13 10 23 0.5 0.4 0.9 11 9 20 0.5 0.4 0.9 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.6 1.6 5-Clouds, Dust, etc. 3 7 10 0.1 0.3 1.9 2 7 9 0.1 0.3 0.4 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 261 0 261 10.2 0.0 10.2 236 0 236 10.0 0.0 10.0 2 0 2 25.0 0.0 25.0 14 0 14 21.9 0.0 21.9 7-Psychological 36 9 45 1.4 0.4 1.8 36 8 44 1.5 0.3 1.8 0 1 1 0.0 12.5 12.5 0 0 0 0.0 0.0 0.0 8-Unknown 497 0 497 19.5 0.0 19.5 455 0 455 19.2 0.0 19.2 1 0 1 12.5 0.0 12.5 11 0 11 17.2 0.0 17.2 9-Other 92 28 120 3.6 1.1 4.7 79 20 99 3.3 0.8 4.1 0 0 0 0.0 0.0 0.0 3 6 9 4.7 9.4 14.1 ASIA AERICA AUSTRALIA 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 7 5 12 7.9 5.6 13.5 0 1 1 0.0 4.7 4.7 1-Astronomical 12 5 17 13.5 5.6 19.1 6 1 7 28.6 4.7 33.5 2-Aircraft 4 10 14 4.5 11.2 15.7 0 4 4 0.0 19.0 19.0 3-Light Phenom. 1 0 1 1.1 0.0 1.1 0 0 0 0.0 0.0 0.0 4-Birds 2 0 2 2.2 0.0 2.2 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 1 0 1 1.1 0.0 1.1 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 4 0 4 4.5 0.0 4.5 5 0 5 23.8 0.0 23.8 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 8-Unknown 26 0 26 29.2 0.0 29.2 4 0 4 19.0 0.0 19.0 9-Other 10 2 12 11.2 2.2 13.4 0 0 0 0.0 0.0 0.0 </td * SEE FOOTNOTE ON NEXT PAGE.
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.