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.

  • p. 121 …lln ;i._;i.. ) l..17 !f/) ft,,;- roe• .2,/ l..rs.9 61 IJ.(/ /)_{) P.P…
;T,i,A/0,1.DV ,,c-L - ,,7y
,.,_ Per.Cent Number Per Cent
EYll1111lon Certain Doubtful Tolll Certain Doubtful Total certain Doubltul To131 Certain Doubtful Total
~8'11000,_ I /) I ,. 1 0.0 n I () I 5., (),0 S:t
:l•Astrolllftlltal I/ I;- ,- )6.1 1C-7 51.'f ~ I ' ;JJ.) r., l.7.9
12-Aucratt 0 0 /J O.Q 0. 0 0. {) 1-- 2. If (/./ //./ 22-~
3-Lict,:tPbenorn. 0 0 p O q q 0 0 0 ~ /) 0 0. (l O.Q o.o
4•Birds I' 0 () 0 0 00 0 iJ 0 /) I) 0,, Q.O (l.(l
S-Clouds, llu>l et~ /) 0 0 (JO (/_0 Q./ ~ C tJ a. a O,q o.o
6-lnsuffit. kit>. ,, /) 0 0. 0 0() (),() I 0 I 1.' o.0 s. t
1-Psydlolo&iCII ;t._ tJ .l.. 11.3 0. 0 /j_ 3 /) /) /) 0.0 0,0 o.G
~-- 7-- 0 ., 13.3 0.() /J.1,
' tJ , 11.B 0.0 27.9
~aw, 2 /) 1 11. l 0. p ,1.1 .2. L) .2... /I. I (/,() /1-1
T~ // .II- 15 7].J 76,7 /PP. IS 3 /fl /JJ.3 16.7 I OP.
NAY 7u C
Number Per Cent Numbe, Per COIi
Entaation Certain Doubtful Tolll Certain llomtful Tolll Certain Dotmttul To131 Certain Doubtful Total
~8'11- II H I'S n, 'f.5 17.0 21 £ ;n IJ_(/ 3.7 16.
l·Astnlnollical 111- 7 I' /'5.q 1-3 1/.'J. hJ 17 41 ,,,_' /0.C 25.5
2..\ircmt 1.i.. I? ,t;- IH o., 17. 2.£ 1.i.. J, It-I 7-5 ·;/J.6
HitfilPII""". J t' 3 JI} 0 p 3.f I I) I 0.f, Q.I .C,
4-Birds () C 0 I. 0 0 0 ().0 iJ I? 0 h.Q a.Q o.o
~Clouds, Ousl et~ 7- tJ -:i '). 3 o.o :n /) iJ 0 O.Q 0.0 o.'
6-lnsuffic.•ta. I, I/
' ,.a (J 0 t.9 /( CJ ,; JI.] n.o //. 2
l-Psydnlo1i<>1 r {? 0 0 0 0. 0 0.0 JI. /)
" H /),() 1-5
&-IJwoNI /J/. (} l'f /J.'I o. 0 15.1 ,, v 26 It. I ()Q II./
~11.., 7 I 9 fl.0 I I 'f_ I s J ~ 3- / o., 1.7
I Totll 6 'I I 'f qg ]i.' 2/.f, /10. Jl5 36 16) 17-' 1).'f JQO.
5£PT&"'4/?ER /J,:;TL7 >r,,;,
I Number Percent
- Per Cent
Enluation Ceftain 0Ollbtful Total Certain Domlflll Tolll Certain DoolJttul Ta131 Certain Doubtful Total
~8'11- JJ II 15 1-i 75 /0. 'J. .J '1 n. /./.1 12-1 "·'l•Astnnlllical ;2.]. 'I 3( 1.ro ti 2/. I 10 tr I? /J/./ J:l.1 Qt .!l
1--Aircraft q 31 I/ (I t.1 1/-/ 1-2n 1J. II /5 f. ' IH 2/.I
3-litfitl'llam. I 7- 3 0.7 /.It 2. I I) jJ. I./ (10 s., .s-.,
4-Birds I 2_ 3 Q7 I 'I 1.1 I I :l I-If 1-4 u
~Clouds, Dust, et~ () J I 0 0 0.1 o. 7 0 I I O. O /. it /-'I
6-lnsuffi~ illo. I).. (1 12 ,9-?. 00 8-1. JI. 0 If- _r;,t, 0. 0 $'.f,
1-Psydnlo&i<>I () I 07 0 0 o. 7 0 I) 0 o.o 0.0 (}.Q
~Unknc• J3 JJ 33 11'1 00 21-'f II 0 II /IS 0 p /5';
~11.., 6 2. 8 I'll /.'t )5 J_ I 3 H /.If in
Total lf7 sa J!l-7 tn 1¥. 5 m. 15 3 (, 71 49_1 ro.7 I CO.
122
#~c,cN
Number Pa Cent
[;ertain Doubtful Total Certain Doubtful Tolll
3 I °JI 11.s lt.:J. II..,
I 0 I 'f,'l (),() 'f, 1
J ..2. S IJ-5 9.1 ao.~
/) tJ I) o.O o.o 0.0
/ LJ I 'f.'J 0.0 '1,2
0 I I o.O 4.2 '/.'
I JJ I If 1 0.0 '-1.1
j tJ ~ o. p l).p Q, 0
~ /) jJ. lt.'1 o. (} 1'-7
I t5 'T 'I,'). 25.0 11.
JJ/, It? .:UJ. 59 3 41- 1 100.
r,, V
Nulmer Per Cent
ertain Doubtful Tolll Certain Doubtful Total
6t 11-7 in /';/.1 7.2 19'!
'It 3/} /10 13. 7 11., l'l,3
,ft} 7• /70 (II 9. II, I 'H-1
/2 If It /,fl n.!. 1 .4
J I 'f 0,5 0. 1 0.7
I I ;I. n.'l 0.2 o. 'f
/,~ 0 68 /0,lf q.g In.Ii-
9 S' /1./ I. If O 8 '.1.'2
!/.l-.J 0 111 18.B q.g 1$.?
II I 12 1,7 0,1.. /. q
11'/lt /62 6.57, 7f,3 1'1.7 m.
Mov,e-,...,,:,,1,,R
Nuat>er Per Cent
Certain Doubtful Total Certain Doubtful Total
.z fr ID 1-7 /If.~ Ii.•
5 s IA 1-3 'l.'3 1,9.?
3 .3
' s. .. u I/.')__
z. J 3 3,7 /.? r.t
0 t) 0 0.0 0.0 o.O
/) :z_ :l 0. 0 J.7 3-7
IJ p if 1.4 0.0 7-4
I t) I /.' 0.0 J.'J
/.6 0 I t Ht. o.o 'J.'!.t
1. t) :z. J.7 ().O 3.7
35 I "I Sp l'f_~ 35- 2. JQP.
AP""'/
Number ""Cent
Certain Doubtful Tolll Certain Doubtful
3 '? 6 J,3 J,J
IS I') 15 It. 'S (). p
I'? 7 'J 0 /lf-J 7-7
I ,1 I 1- I o.o
'j' I 4- 1.J J.J
/J t) 0 (),0 V 0
'"' I) ID II. o ().0
I 0 I I. I (). 0
J:Z. 11 .1, 35.?. o.n
2 0 2. 1.1 o. 0
90 / I r; 87.'f !1-I
.ti. ,,.,, sr
Number PerCmt
Certain Doubtfu Total Certain Doubtful
31, ,.,, 75 in JI. 1
li .ZS ,, 1/.7 7-2
/JI JIJ 75 "· 7 'I. 7
f 6 JI /.If /.7
I) tJ 0 U.fl o. ()
tP I I o.n 0- 3
:,; I) Ji 9. 1 0. 0
t,( I 't 2-3 0. 3
,0 I? C7 /f. '2 o. ()
9 ti- / i :i-b 1. I
~37 /10 JJl.'I r,v.i 'J/. 5
./;?,r,,.-;,,-;9,1;,'?
Number Per Cent
Certain Doubtfu Total Certain Doubtful
() ? ~ t() I/.~
'1 7 u ,9.7 It/ &
I J/ I 2 ti 1',/.ff
I () I 'l-1 o.o
t) () 0 o.o o. ~
11 /J 0 o.O o.a
:! t) '3 ,.1 o_o
I) CJ 0 0-0 0.0
II t? ii Ji-1 o.O
3 ~ 3 ,. 1 o.o
28 JO Jt'J fi-3 'I/. 7
Tot~
,.,
1,.~
11.0
I. I
'i.'1
o.o
JI. 0
/,I
35"-1
~ -2.
JPO.
Total
?.I-{
18.'J
1/.lf
.'.? I
o.O
o.,
'1-2
1-(,
17-:J.
3.7
IPf
Total
'l.1
13.;
2 5.0
2.J
O.Q
0./)
'-2
o.O
'JU
,.'}
/NJ.
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 above. 312 pages are in the text index: search them above, or from the library's search.