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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.

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Evaluation
0-Ballaoo
1-AslRmOmical
2-Aircraft
Hight Phenom.
6-lnsaffi~ ~lo.
7-Psyd,Jlo&ical
8--
Total
14,u/ /,,_ 'E
I Number Pl!fCent Number PerCmt
Evaluation Certain Ooobtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful
0-Balloon 4 Cl ~ 1/J t?. n R.o ~ ,? 7 /2.5 tJ.tJ
I-Astronomical ,1 2- IS' 72.tJ QIJ 1iO ,f j /(J 17.'> ,,. t/
2-Airmlt ? ¢ 7 I../} 11./J /;/CJ d I S" 1. I /.f
3-Lightf'll...... /} / I /1_/1 f?./J ~o IJ t.? n ,u, /}./)
4-Birds IJ / I t7. (} t.(} ttl /7 /J ,() /1,IJ /J. /)
5-Clouds, Dus~ et~ Cl 0 t.? tJ.tJ t).(J tJ.t) (l L) 0 {J.tJ {). t)
6-lnsuffic.lnfo. 4 0 t;;; 12.tJ 17.0 11~.0 /../ L) 13 H.2 /J.O
7-PsycoologicaJ 0 L) 0 ao 11/J nn :l (J z :u, IJ./1
8-Unkno• l'f ,,., /7 J'/.1.(J n/J ?,fo /Y .,, 17 .JtJ.1 tJ.tJ
!I-Olller t7 / I /J.tJ :t. tJ 2.0 2- IJ iZ :t. I. tJ.O
Totll a1 9 so g'j_l, /f{.0 /PO. s-z ~ S-6 92.9 ,t,/
SE,-,,r,1:M 4',<c£ C},:!.r, -'-""-'
Number Percent _, Per Cent
Evaluation Cerliin Ooobtful Total Certain Doubtful Total Certain Doubtful Total Certin Dwblful
0-Balloon /] 0 0 /J.~ /1 ,,._ ,.,_{) .? .t/ 7 ~-5 Y,7
l•Astrono111ical //) 'f /.? 2.1.2 7.0 :JtltJ J' -? /(J ,:,_,:; /!,. 2,
2·Airc,aft I I 2 R. .! 2.3 t/. I, .J' ✓ 7 £.5 ;.7
3-LilhtPtlemm. /] n 0 /J,1 n /J /J.n /] I I 11.tJ ,1.2,
4-Birds 0 0 t? IJ.t) n.o no z /} ,2 ,/! /}, (}
5-Clouds. Dust. etc. /] IJ 0 /]_/) IJ. /, n ,._ 0 /J 0 ,,. /) 0,/J
6-lnsuffic.klfo. 9 0 '? ttJ.f t).(J 2/1.P 7 /} 7 1st 0.0
7-Psycoological I 0 I ?. ~ /J,O l?.S / /J I 2.2- ,l./1
8-Unlmo• // t? II ?1;.(, 11 tJ 2~/, r; /J 'J 1/J. (J /J_/J
9-0lller (, I 7 1,/,(J 2-3 /{,.! z. 0 z t/.S /') /)
Total .?!< s Ifs ii.I/ //,{, /IJO. .?tJ 1'- ~ 1,5:2 ..1-/.i
172
J,,,t./
Nunter Per Cent
Total Certain Doubtful Total Certain Doubtful
IM 29 // ¢0 I/JI .//!
17. 9 29 //1 39 //.ii .3, 9
i 9 ?? /9 SI 11.t.,; -f.Q
/I (J f /} 3 J.2, /J.0
o.o .z I 3 n.i 17.../
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11.1. (// /7 'fl :It. I I)_/)
7/ / :l 3 17.tl IJ.i
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~L 2/,/' IJ ;z'I- 9.~ /) /)
/tl'J. 212 'f3 2Sf ~(/ l~.9
JI/&.✓,:; ,u ,,&.,
NuntJer Per Cent
Total Certain Doubtful Total Certain Doubtful
15.t I r; /0 ?.I IC.7
2./,J r; ~ /!, l'-1 /.f,5
tff.1, <" 2, 7 /(J.4 ,ft
'1,2, /} /) 0 IJ /) /J/J
-0 Cl t7 0 /1/J /.J./J
I?/] /) I / /1/1 2,/
/<;_t 4 0 ~ £.5 /J_/1
2-2 /] IJ {7 /},/) 17,/J
'U).i? y 0 '? 11.1 /J, (J
,/.( ?. /) z ld..t 17 0
1170- 30 ;g ¥-~ ~2-~ .!1.5"
Total Certin
15-7 5
/5:! 9
/9. 9 /I
/. 1, 2
1.Z t.?
IJ.2 /?
ti../ /9
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lf.i :tf
q_q 2-
I/JP, 78
Total Certain
1./J.I I
.J/.t t
/Q,(, d
/) /) /J
/) /] /7
1,/ 0
f?_f
"/J.n /
11.1 /.l,
¢:t Q
/tlQ· :n
,:;1,,,, , f
Nullber Per Celt
[loubtfu Total Certain Doubtful
41 "l ✓.S .2.K
J< /7 (/, ,f,?
/.f z~ //)./, 12.5
IJ z 1-9 /Jn
/J ,::i /J.IJ n,n
/) 0 IJ.11 IJ.IJ
IJ /9" /fl :I tJ.o
IJ / 1,/J 17.0
c? 29' 27.9 /7. (?
/ 3 I. 9 /. 17
z~ /0'1- 75-1', 26.fl
/./$I! GM#c"..t'
Number PerCmt
lloubtfu Total Cerlllin lllllblful
I z ~?, 2.2,
// /7 /J.(J tU.9
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IJ 0 ,r) /) /}/}
/} 0 /J 11 /.J, tJ
IJ {) //1_,; /11'
/} I '2-2. /J. tJ
/} 12 ~/,_/ /J,IJ
/7 ¥'. S/.1 /).0
/3 'I" 1/.I :d..t
Total
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Total
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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.