Documents / Case file

CIA-UAP-015, Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

Central Intelligence Agency · 312 pages · text from the file's own layer

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.

Evaluahon ,0-Billoon,. I-Astronomical 1----r- 12-Ancrlft 3-Li&fll Phenom. 4-Birds 5-Clouds. Dust, etc. 6-lnsuffic.lntt. 7-Psydlololical a.-- t-Olller Tolol Evaluahon 0-Balloon I-Astronomical 2-Aircraft 3-Liatit Ptlenom. 4-Birds ~Clood~ Dus~ et~ 6-lnsuHit. lnfa. I-Psychological 8-Unk.no.11 9-0llle, I Total Evaluation 0-S.lloon l•Asbonomical ?·Aircraft 3-Li&fill'li-. 4--Birds 5-Cloud~ Dus~ et~ 6-lnsuffic."to. l•Psydlololical l,lJnkno., t-Olher Toi~ Evalualioo 0-Balloon I-Astronomical 2-Aucratt Hi&fill'hIV t?F t'JA un:r SIGN'~T,~t=d(~G~S~-~6~e=,,r~-11~"-="-~-f1~1!c"-A='.R~=5__~d'~f'~------ #(/,U#J;L t'JF t'Jd.lc/!75 Rt~ 5/G,¥-r/A✓ G • cl,1/£ t?.R✓Ee.r • "7/]r, /. /?4"7 / /?q rt /? L :2/ //.l.J I;// 1¢.// 11 1 1. ,0,.-/1 /95/ /f.5"2,, Number Per Cent Number PerC01I Nud>er Per Cent Nomber Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doll>llul Total Certain Doubtful Total ~erlain Doubtful Total Certain Doubtful Total Certain Douhtfu Total Certain Ooublful Total IR QflZ /.t.9 ?.9 l!i.i " .J' // ?.f 1'. 9 ,n.1 1/9,:- 40 2/5 //.5 $.5 19.!I -,,/ Fl SI 11.I /(). I) 21 I /t; // !2L. F/.1 //J.1 2i>.S /"!; 117 0 //J n 120 n /17.1 " ,,,.7 P.5 tl.P 1-5 2, 0 2, 1.t.1 IJ.0 1.t.l I I 2, 1/J u1 ?.P ~,, z 2,/ ?.tl d.?. ?.Z .JI tJ .11 ~t./ IJ.O 22.I 27 t> 27 .?t.S tJ. I) 11,.5 ,,,,,,, ,?!'7/Jt> ii.¢ /}n If(/ .7 z 5 2./ /.Z '19,// 21.1, /0,,, 114' ,J/1 ltJn 11.'/' ??,t /tJtJ. ll.17 ,SfGttff/1/G S: dY ~rfiL. ,J::I✓/'? /9,/fi' t.?<V.9 Number Percent Nuniler PerCmt Nullmer Per Cent Numbl!r Per Cail Certain Doubtful Total Certain Dowllul Total Certain -Hui Total Certain Doubtful Total ertain Doubtful Total Certain Doubtful Total Certain Douhtfu Total certain IJoublful Total 17 /II .?I $1 ?'/ l!i. i 0 0 tJ IJ.tJ tJ.t' t1.,:; / ,,, I /( I /1/1 /I. I / /J I '1'7 t?./J ?''1 ~ II 17 f/ 5: I, R.,, I '7. .f Jt/.1 2;',1, //2.f /J t7 t7 /J /] 11.6 0.6 :l 1' t, LJ./ 21.I 1//..2 ,v,, .71 '11 M¥" /5:i .i'L.t. I ;? I 11/.S /1,/1 1f(.1 1 /J J j'.f.1 /Z 0 f'I'.~ ?. :2 ,:/ /S:~ /5J/ .!tJ.I v '}, I, ?/J 1./J f.lJ /J /J t? /J.() ~n n,: / /) I II./ /J.t) /I. I /} ,., t? ,,, ,, 11./J /J. I} /J /) /J./J IJ./, /} I} /J 0 tJ /)I) 17./J n,, ;? ,'; 17 /J.IJ /Jn nn /'7 t:J /,J (l.lJ ~- tJ.,'. /J /J I} ().t) /J.17 /J. /J t? t'J /? ,..,_.,., /J.IJ /!,I} ;? tJ t) /JA /}/] ,,,, /} /} /7 t1.IJ 4-tJ dtJ d 0 Ii ?.t tJ.(l 9.2. t7 CJ tl I}/) /J,/J /J.() t? tJ tl /},() ,,, /J t:7.IJ IJ /J 17 d.n t:1.t? 1217 f I ;/ t 5 /),:; 2.tJ /J CJ 0 IJ.I) t!l.t) tJ.tJ 0 ,,, t) /J,/J /} /) "!n /} l'7 t? /J/1 t).LJ LJ.tJ t1 I} 31 112'9 /J./J ;r.9 I 0 / /t/.J /J.1) /t/J CJ CJ t) rJ.tJ IJ.t) /JI'} fl_ /J Z /5¢ CJ.I) 15'.4 9 1 d, qi, J.5 /,,,I 2. tJ t. 2K.t IJ.0 ?i't. I J // 11./ .55.J //t/~ 0 /) t? J?.O /1.,, l!.?.tl ;JI/ &,2- /91, /,,ff/I .7/t IM. 5' 1. 1 1/4 2.~1, //JD. I. 5 9 l&-£.1 .!f..! /PP. £ 5' u t.1.5' .14'.5 /tJ(). i?S.7 11'9 /95::Z.. - PerCmt Number PerCenl Number Percent N,_ Per Cent Cert•• Doubtful Total Certain Doubtful Tola! ~ertain Doubtful Tola! Certain Doobllul Total ....;. Dowtful Total Certain Ooublful Total Certain Doubtful Total Certlin DoulJllul Toi~ / /) I /17./J /J.tJ /tJ.O /J 0 /J tl./9 /J.O 10.n /I/ id ?R 4/7 9.0 IJ?~ /} /} 0 /1J? 17./J IJ,(J /) ;? /) /J,/J t}. t? o.o fl_ I, f /.$ :n:; 6..t I/ I .,,- /,l'tl,O I/J.t:J 1..-1.10 ;? /} 0 11.0 /J.tJ tJ.I) ft'J '21 5x /9.// /{i' / .J?.5 /J 0 0 tJ.tl tl./J /J.O .,., ,,, /] /J,/J /}/J 11'7./l , 2. !, /.9 1.1 .£2 /) 0 /J tJ.o O.u /J. /} /) 0 /J /J./,1 /J./J CJ,/J n (J 17 ,u, /J./. t).n /J /} 0 0./J /J./J ~,,, I? ,:J n /J.O /J.o /} 0 /J 0 /J IJ.0 /J.t; IJ.O I /J I ,nn CJ.o 1/tJ.() /J 0 0 /J.n O.P /J./J l'1 t:J /1 /It? d.l.l 1/.l.l ,'J 0 t) /J /J tUJ n.n /J /J 19 /JO /Jn t).t) .f I 4 19 t1.I. 2.5 2,. 0 z 'JJJ,IJ /J. /) i-?,?,;, I 0 I 5(),0 /}.,J ,;I).() ?, 0 .?/ 2()17 ~.,., :2/V / 0 / ,•'{J.{; tJ. (J /o.o / /,J I '51)./1 IJ. tJ 5/J.ll </ ;? LI 2.1. ,?,I} 2.t. , I //] ltJ./J /().(7 ,,,,, :v t) 2, ltBJl(J t?. 17 IM Jpt/ ',/ 15'!, IL~/ 52.! /PO, 150 I I I I I I I I I I I I I I I I I I I I I I

Cases discussed

About this file

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.