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.
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 Evaluation ATLANTA WACO SAN ANTONIO BALANCE OF SOUTH MIDWEST 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 6 12 18 6.9 13.8 20.7 3 5 8 2.1 3.5 5.6 7 0 9 11.5 3.3 14.8 17 17 34 5.0 50 10.0 1-Astronomical 8 12 20 9.2 13.8 23.0 33 64 97 22.9 44.4 67.3 6 8 14 9.8 13.1 22.9 34 21 55 10.1 6.2 16.3 2-Aircraft 10 11 21 11.5 12.6 24.1 4 7 11 2.8 4.9 7.7 5 6 11 8.2 9.8 18.0 57 35 92 16.9 10.4 27.3 3-Light Phenom. 2 1 3 2.3 1.1 3.4 1 0 1 0.7 0.0 0.7 1 0 1 1.6 0.0 1.6 1 0 1 0.3 0.0 0.3 4-Birds 0 0 0 0.0 0.0 0.0 4 1 5 2.8 0.7 3.5 0 0 0 0.0 0.0 0.0 0 2 2 0.0 0.6 0.6 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. 8 0 8 9.2 0.0 9.2 12 0 12 8.3 0.0 8.3 2 0 2 3.3 0.0 3.3 34 0 34 10.1 0.0 10.1 7-Psychological 0 2 2 0.0 2.3 2.3 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 1 4 0.9 0.3 1.2 8-Unknown 13 0 13 14.9 0.0 14.9 9 0 9 6.2 0.0 6.2 21 0 21 34.4 0.0 34.4 108 0 108 32.0 0.0 32.0 9-Other 1 1 2 1.1 1.1 2.2 1 0 1 0.7 0.0 0.7 1 2 3 1.6 5.3 4.9 5 2 7 1.5 0.6 2.1 Evaluation ALBUQUERQUE BALANCE OF SOUTH WEST 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 12 5 17 57 2.4 8.1 26 5 31 14.8 2.8 17.6 1-Astronomical 21 60 81 10.0 28.6 38.6 23 22 45 13.1 12.5 25.6 2-Aircraft 11 19 30 52 9.0 14.2 15 13 28 8.5 7.4 15.9 3-Light Phenom. 0 0 0 0.0 0.0 0.0 2 2 4 1.1 1.1 2.2 4-Birds 0 1 1 0.0 0.5 0.5 0 1 1 0.0 0.6 0.6 5-Clouds, Dust, etc. 5 0 5 2.4 0.0 2.4 0 2 2 0.0 1.1 1.1 6-Insuffic. Info. 16 0 16 7.6 0.0 7.6 11 0 11 6.2 0.0 6.2 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 8-Unknown 53 0 53 25.2 0.0 25.2 51 0 51 29.0 0.0 29.0 9-Other 1 6 7 0.5 2.9 3.4 3 0 3 1.7 0.0 1.7 TABLE A228 EVALUATION OF ALL SIGHTINGS IN THE STRATEGIC AREAS LOS ANGELES BALANCE OF SOUTH FARWEST 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 21 10 31 18.3 8.7 27.0 1 2 3 3.8 7.7 11.5 1-Astronomical 5 8 13 4.3 7.0 11.3 1 3 4 3.8 11.5 15.3 2-Aircraft 14 5 19 12.2 4.3 16.5 4 1 5 15.4 3.8 19.2 3-Light Phenom. 2 0 2 1.7 0.0 1.7 1 0 1 3.8 0.0 3.8 4-Birds 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 6-Insuffic. Info. 8 0 8 7.0 0.0 7.0 4 0 4 15.4 0.0 15.4 7-Psychological 2 1 3 1.7 0.9 2.6 1 0 1 3.8 0.0 3.8 8-Unknown 31 0 31 27.0 0.0 27.0 3 0 3 11.5 0.0 11.5 9-Other 8 0 8 7.0 0.0 7.0 1 4 5 3.8 15.4 19.2 </td
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.