PROJECT BLUE BOOK

PROJECT 10073 RECORD CARD
MULEI
1. DATE 2. LOCATION 12. CONCLUSIONS
Was Bolloon
26 February 1960 San Juan, Puerto Rico 0 Probably Belloon
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION 0 Possibly Bolloon
Locel Ground-Visual Ground-Visual Ground-Rodar Ground-Rodar 0 Was Aircroft Was Aircroft
000 0 Probably Aircraft Probably Aircraft
GM26/23022 Air-Visual Air-Visual Air-Intercept Radar Air-Intercept Radar Possibly Aircraft
5. PHOTOS 8. 6. SOURCE Was Astronomical Was Astronomical
Yes 0 Yes 000 Probably Astronomical
No Military and Civilian Possibly Astronomical Illumination illumination
Navy
7. 7. LENGTH OF.OBSERYATION LENGTH OF.OBSERYATION 3. NUMBER OF OBJECTS  9. COURSE NUMBER OF OBJECTS  9. COURSE Other- Other.
000 000 Insulficient Data for Evaluation
Less than 1 sec. Less than 1 . sec. 1 SW & SE SW & SB Unknown Unknown
HO. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
Round object, size of large pea at arms Round object, size large pea at arms Evaluated as Navy surface unit con-
length, bright length, bright red with yellowish-orange with yellowish-orange ducting night illumination training
tinge, left contrail which persisted at exercise by USN.
point Of disappearance for l0 min. Four
additional reports of similar activity
by ground and air observers of pyrotechnic
activities. Also described as possible
missile reentry.
ATIC FORM 329 (REV 25 SEP 52)
A

I
AF IN.: 27109 (27 Feb 60) R/L/cas
ACTION: CIN SAFS.
INFO : ARMY, JCS, D, NSA, CIA, OOP, OOP-CP,
NNNN SMD B 076
CZCHQD07 1ZCBJA086
00 RJEZHO
DE RBEJC 34 FO
0 270300Z
FM COMCARIBSEAFRON P. R.
TO RBEK C/CINCLANTFLT
RJWFALB/CINCNORAD
RJEZHO/COFS USAF WAS DC RJEzho/coFs USaF WaS DC
RBEPW/CNO RBEPW/CNO
0 262315Z SAFot3 SAFOt-3
FM USS TRINGA FM USS TRINGA
TO COMCARIBSEAFRON
BT
TRINGA PONCE ARBOR SIGHTED BRILLIANT FLASH TRAILING SMOKE
POSSIBLE AIRCRAFT SM OKE REMAINED NO C UTES SIGHTED
BT
CFN 2618503 330 30000 270
27/0300Z
NOTE ADVANCE COPIES DELIVERED TO CIN AND OOP-CP

UNCLAS EFTO
C ZCSQE812 ZCAYB335
RR RJEDSQ_ IRE 2 27
DE RJEXSA 31
R 2817002
FM 72 BOMWG RAMEY AFB W4O
TO
JWFAL/AIR DEFENSE COMMAND ENT AFB 34x2a
RJEDSO/AIRTECHNICAL INTELLIGENCE CENTER WRIGHT S AFB
RJEZKQ/HQ USAF AFCIN WASHINGTON 25 D C -
RJEZHQ/SECRETARY OF THE AIR FORCE SAFIS WASHINGTON 25 C
INFO RJWXBR/CINCSAC OFFUTT AFB ATIC
RJEXDH/SAF WESTOVER AFB
BT PT
C C.
UN C LA S EF T O FROM DCOI 2S59. SUBJECT: UN C LA S EFT O FROM DCOI 26S9. SUBJECT:
UFO REPORT. THE FOLLOWING INFORMATION IS SUBMITTED IN ACCORDANCE
WITH AFR 200-2, 14 SEP 195S. AS AMENDED. A. DESCRIPTION OF OBJECT. WITH AFR 200-2, 14 SEP 195S. AS AMENDED. A. DESCRIPTION OF OBJECT.
(1) BALL-SHAPED. (2) SIZE WAS COMPARABLE TO A LARGE PEA HELD IN THE (1) BALL-SHAPED• (2) SIZE WAS COMPARABLE TO A LARGE PEA HELD IN THE
HAND AT ARM'S LENGTH• (3) COLOR WAS BRIGHT FLAMING RED WITH HAND AT ARM'S LENGTH• (3) COLOR WAS BRIGHT FLAMING RED WITH
YELLOVISH-ORANGE TINGE. (4) SINGLE OBJECT. (5) NOT APPLICALBE. YELLOWISH-ORANGE TINGE. (4) SINGLE OBJECT• (5) NOT APPLICALBE-
(6)-NO DISCERNIBLE FEATURES OR DETAILS. (7) NO TAIL, TRAIL OR (6)-NO DISCERNI TURES OR DETAILS. (7) NO TAIL, TRAIL OR T
EXHAUSE, HOWEVER OBJECT LEFT WHAT WAS DESCRIBED AS CONTRAIL.
CONTRAIL WAS APPROXIMATELY TWICE THE SIZE OF THE OBJECT AND PERSISTED
AT POINT T OF DIS ARANCE OF FLAMING OBJECT IN WISPY FORM FOR TEN
PAGE TWO RJEXSA 31
MINUTES. (3) NO SOUND CONNECTED WITH SIGHTING. (9) NOT OTHER
PERTINENT INFORMATION. B. DESCRIPTION OF COURSE OF ORJECT. (1)
OBSERVER NOTED OBJECT BECAUSE HE HAPPENED TO BE LOOKING IN THE
DIRECTION OF THE HTINE. (2) OBJECT WAS THOUGHT TO BE AT AN
ELEVATION OF 4 DEGREES AND D AN AZIMUTH OF 310 DEGREES WHEN FIRST
OBSERVED. (3) OBJECT WAS THOUGHT TO HAVE ARFD AT AN

PAGE TWO RJEXSA 31
OTHER
PERTINENT INFORMATION. B. DESCRIPTION OF COURSE OF OBJECT. (1)
OBSERVER NOTED OBJECT BECAUSE HE HAPPENED TO BE LOOKING IN THE
DIRECTION OF THE SIGHTINE. (2) OBJECT WAS THOUGHT TO BE AT AN
ELEVATION OF 40 DEGREES AND AN AZIMUTH OF 310 DEGREES WHEN FIRST
OBSERVED- (3) OBJECT WAS THOUGHT TO HAVE DISAPPEARED AT AN (
ELEVATION OF 35 DEGREES AT AN AZIMUTH OF 300 DEGREES• (4) FLIGHT
PATH APPEARED TO BE A STRAIGHT LINE. (5) OBJECT DISAPPEARED WITH
WHAT APPEARED TO BE AN INTENSIFICATION OF FLAME- (S) ORJECT WAS
VISABLE FOR LESS THAN ONE SECOND. C. MANNER OF OBSERVATION.
(1) THIS WAS A GROUND VISUAL SIGHTING. (2) NO OPTICAL AIDS WERE
USED. (3) NOT APPLICABLE. D. TIME AND DATE OF SIGHTING. (1) /
OBSERVER WAS AT 13 DEGREES 27 31 N 65 DEGREES D4 02 W OR 3 3/4
MILES NNW OF ISLA VERDE AIRPORT, SAN JUAN, PUERTO RICO. F.
IDENTIFYING INFORMATION ON OBSERVER: (1) REGINALD P BRIGGS, AGE
31, ADDRESS: UNITED STATES DEPARTMENT OF INTERIOR, GEOLOGICAL 31, ADDRESS: UNITED STATES D DEPARTMENT OF INTERIOR, GEOLOGICAL
SURVEY, BOX 83, ROOSEVELT, PUERTO RICO, OCCUPATION IS GEOLOGIST,
ESTIMATE OF RELIABILITY IS EXCELLENT. G. WEATHER AND WINDS. ESTIMATE OF RELIABILITY IS EXCELLENT. G. WEATHER AND WINDS.
(I) OBSERVER ACCOUNT (I) OBSERVER ACCOUNT T OF WEATHER OF WEATHER CONDITIONS VAS CONDITIONS wAS REPORTED REPORTED AS AS CLEAR,
~
PAGE THREE RJEXSA 31
NO CLOUDS• (②) WIND DIRECTION AND VELOCITY IN KNOTS IS AS FOLLONS
AS RECEIVED FROM U.S• NAVAL STATION, SNA JUAN
ALTITUDE DIRECTION VELOCITY IN KNOTS
SURFACE ESE
6,000' 090 24
10,000° 070 87
216,000' 06D 10
20,020' 120 37
30,000* 350 19
50,000' 330 09
60,000' 013 03
(3) CEILING i WAS UNLIMITED, LESS THAN 1/10 CUMULUS CLOUDS. (4)

5,003' 090 24
10,000' 070 87
215,000' 0S2 10
20,000' 120 07
30,020' 350 19
50,000' 330 09
60,000' 010 03
(3) CEILING WAS UNLIMITED, LESS THAN 1/10 CUMULUS CLOUDS• (4)
-
IN AREA- (7) STANDARD TEMPERATURE GRADIENT. H. NO UNUSUAL
ACTIVITY OR CONDITION WAS DISCOVERED THAT MIGHT ACCOUNT FOR THE
SIGHTING. I. NO INTERCEPTION OR IDENTIFICATION ACTION WAS FEASIBLE.
J• A RAWINSODE BALLON WAS RELEASED FRCM ISLA VERDE AIRPORT 3 3/4 (
MILES, EAST FROM LOCATION OF OBSERVER AT 23O5Z• BECAUSE OF THE (
NATURE OF THE SIGHTING DO NOT BELIEVE THIS BALLON COULD ACCOUNT
FOR THE SIGH K PREPARING SOFFICER OF THIS REPORT IS S CAPTAIN
-
4 -
te in e
PAGE FOUR RJEXSA 31 PAGE FOUR BJFXSA 31 (
DONALD K MANGELS, CHIEF, COMBAT INTELLIGENCE BRANCH, WING INTELLIGENCE E
DIVISION, 72ND BOMBARDMENT WING. PRELIMINARY ANALYSIS OF THIS
SIGHTING WOULD INDICATE A POSSIBLE REENTRY OF SOME VARIETY OF
BALLISTIC MISSILE OR EARTH SATELLITE VEHICLE- THE MANNER IN WHICH
OBJECT DISAPPEARED (SEE ITEM BGS) ABOVE) IS THE PRIMARY SUPPORT FOR
THIS ANALYSIS• ALTHOUGH THE ESTIMATED AZIMUTH WHEN FIRST SIGHTED
COMPARED TO AZIMUTH UPON DISAPPEARANCE VOULD INDICATE MOVEMENT FRCM
EAST TO WEST OBSERVER WAS NOT POSITIVE OF THESE FIGURES, PRIMARILY
BECAUSE OF THE EXTREMELY SHORT TIME THE OBJECT WAS OBSERVED: BECAUSE
OF THE SHORT DURATION OF THIS SIGHTING, DIRECTION OF MOVENENT AS
INDICATED IN ITEM B ABOVE IS NOT CONSIDERED ABS OLUTE RELIABLE
BY THE PREPARING OFFICER.
BT
08/1720Z MAR RJEXSA

-
(
PAGE FOUR RJEXSA 31
DONALD K MANGELS, CHIEF, COMBAT INTELLIGENCE BRANCH, WING INTELLIGENCE
DIVISION, 72ND BOMBARDMENT WING. PRELIMINARY ANALYSIS OF THIS
SIGHTING WOULD INDICATE A POSSIBLE REENTRY OF SOME VARIETY OF
BALLISTIC MISSILE OR EARTH SATELLITE VEHICLE• THE MANNER IN WHICH
OBJECT DISAPPEARED (SEE ITEM B(S) ABOVE) IS THE PRIMARY SUPPORT FOR
THIS ANALYSIS: ALTHOUGH THE ESTIMATED AZIMUTH WHEN FIRST SIGHTED
COMPARED TO AZIMUTH UPON DISAPPEARANCE WOULD INDICATE MOVEMENT FRCM
EAST TO WEST OBSERVER WAS NOT POSITIVE OF THESE FIGURES, PRIMARILY
BECAUSE OF THE EXTREMELY SHORT TINE THE OBJECT WAS OBSERVED. BECAUSE BECAUSE OF THE EXTREMELY SHORT TIME THE OBJECT WAS OBSERVED• BECAUSE
OF THE SHORT DURATION OF THIS SIGHTING, DIRECTION OF MOVEMENT AS OF THE SHORT DURATION OF THIS SI GHTING, DIRECTION OF MOVEMENT AS -
INDICATED IN ITEM B ABOVE IS NOT INDICATED IN ITEM B ABOVE IS NOT CONSIDERED ABS OL ABS OLUTE RELIABLE
BY THE PREPARING OFFICER.
BT BT -
08/1720Z MAR RJEXSA
(
-
NNNN
UNCLAS EFTO

( DEPARTMENT OF THE AIR FORCE
STAFF MAESSAGE DMVICION
AF IN : 27107 (27 Feb 60) NCLASSINEO MASTSAGE
R/COMING
ACTION: CIN
INFO : ARMY, JCS, OSD, NSA, CIA, OOP, OOP-CP, SAFS
SMD B 074
CZCHDA707ZCBJA080
00 RJEZHO
DE RBEJC 33
0 270228Z
FM COMCARIBSEAFRON P R
TO RBEKHC/CINCLANTFLT
RJWFALB/CINCNORAD
RJEZHO/COFS USAF RJEZHO/COFS USAF WASHDC WASHOC
RBEPW/CNO 0/-3 0/-3
NAVY NAVY GRNC GRNC UFO UFO
3T
CIRVIS EVALUATION X MY 270042Z X EVALUATION UNKNOWN BURNING OBJECT X
NAVY SURFACE UNIT CONDUCTING NIGHT NAVY SURFACE ILL UM INAT I CISE FROM
EVALUATED NIGHT ILLUMIN EXERCISE
BT
CFN 270042Z 270001ZS270300Z 10 18-50N 70120Z
27/0245Z
NOTE .: 270042Z is AF IN 26865 (27 Feb 60)
Advance copies

AF IN : 26055.(27 Feb 60) R/L/dqNT OF THE AIP FORCE,
ACTLON:. CIN MAECSAGE DIVISION
INFO ARMY, JCS, OSD, NSA, SAFS
SMD C027
ZGZCHOB796ZCBJA039
*YY RJEZHO
DE REEJO 16 fe
Y270042Z
FM COMCARIBSEAFRON
TO FBEKHO/CINCLANTFLT
RJWFALL.GINONORAD
RJEZHQ/COFS USAF VASHDO
RBEPV/CNO
0 262340Z
FM FAA SAN JUAN PR FM FAA SAN JUAN PR
TO COMCARIBSEAFRON 01-3
3T
CIRVIS. FOLLOVING THREE CIRVIS. FOLLOVING THREE E PEPOPTS CMM AT 2306 RO0SEVELT ROADS CMM AT 2306 POOSEVELT ROADS
STAIV
TRAIL OF SMOKE APRXLY NNV OF ROOS RDS AT 20 THOUSAND FEET.
THE BALL OF FIRE D CSCENDED ABOUT FIVE THOUSAND FEET TO FIFTEEN
THOUSAND FEET AND DISAPPEAPED. THE SMOKE TRAIL WAS STILL VISIBLE
AI 23O5Z. AIRORAFT WK2 A4DJ AT THIRTY FIVE THOUSAND FEET REPOPTED
TO US AT 2S147 THAT HE HAD SEEN A BALL OF FIRE AT 55 THOUSAND
AIR LINE PILOT ADZD AT 2335 WHILE IN FAA STATION THAT
HE SAX STREAK BLUE VHITE FIRE H HEADING NOPTHWEST FROM SOUTHEAST
WHICH APPEARED TO HAVE BURNED OUT LEAVING BLUE WHITE SMOKE FROM
HIS POSITION AT ENTRANCE TO CARIBE HILTON HOTEL. HE ADVISED COULD
HAVE BEEN SOME SOPT OF PEENTRY. TIME 23057
B7
CFN 2306 26 23057 VX2A4DJ.23 143D2502883-230R7D CIN

/
MINNG
AF IN : 26954 (27 Feb 60) T/L/jej
ACTION: CIN
INFO : ARMY, NAVY, JCS, OSD NSA, CIA CMC, OOP OOP-CP, SAFS
SMD 3 037
CZCHOE105ZCBJA3S3 Gude
00 RJEZHD
DE RBEJC 25
0270120Z
FM COMCARIBSEAFR ON V
TO RBEKHC/CINCLANTFLT TO RBEKHC/CINCLANTFLT
RJWFALB/C INONORAD RJWFALB/CINCNORAD
RJEZHO/C OFS USAF WASHDC RJEZHO/C OFS USAF "WASHDC
RBEPW/CNO RBEPW/ONO
0 272052Z
FM FAA SAN JUAN 01-3
TO COMCARIBSEAFR ON
BT
CIRVIS. AT 27B044 MJIR TOWER CONTROLLER ADZD SAW A BALL
I TRAIL OF RED SPARKS BEHIND IT OMA APPEARED
TO BE APRXLY TWO TO THREE THOUSAND FEET AND ABOUT 3 MILES SOUTH
CAPE SANJUAN LIGHT. HOUSE
BT
CFN 270044 3
27/0125Z Advance copies delivered to CIN and OOP-CP
NOTE

C DEPAMTMEVT OF THE AR FORCE
SIN ASSACE DMISION
UNCLAALHEO BASAGE
AF IN : 26860 (27 Feb 60) R/L/q CO MIN G
ACTION: CIN
INFO : ARMY, JCS, OSD, NSA, CIA, OOP AFS.
SMD A 032
K
ZCHQA666ZCBJA038 1
…… YY RJEZHQ
DE RBEJC 17
Y270044Z
FK COMCARIBSEAFRON
TO RBEKHC/CINCLANTFLT
RJWFALB/CINCNORAD
RJEZHQ/COFS USAF RJEZHQ/COFS USAF WASHDC WASHDC
RBEPW/CNO
0 270025Z
FM FAA SAN JUAN FM FAA SAN JUAN 01-3 01-3
TO COMCARI
BT
CIRVIS. FURTHER RE OUR CIRVIS 262345. WBAS ADVISED THAT PILOT
ON JET PAA 451 SOUTHBOUND CVER SOUTH CAICOS SAW METEORITE OR
MISSILE RE/ENTRY MOVING FRON NW TO SE. SEENED TO HAVE
BURNED OUT BUT COULD POSSIBLY HAVE DISAPPEARED INTO HAZE
BT
CFN 262345Z 451
27/0047Z
NOTE to OOP-CP & CIN