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The Report on Unidentified 
Flying Objects 
 
The Project Gutenberg EBook of The Report on Unidentified Flying 
Objects 
by Edward Ruppelt This eBook is for the use of anyone anywhere at no 
cost and with almost no restrictions whatsoever. You may copy it, give 
it away or re-use it under the terms of the Project Gutenberg License 
included with this eBook or online at www.gutenberg.net 
Title: The Report on Unidentified Flying Objects 
Author: Edward Ruppelt 
Release Date: December 18, 2005 [EBook #17346] 
Language: English 
Character set encoding: ASCII 
*** START OF THIS PROJECT GUTENBERG EBOOK 
UNIDENTIFIED FLYING OBJECTS *** 
 
Produced by The Blue Book Archive
THE REPORT ON UNIDENTIFIED FLYING OBJECTS 
BY EDWARD J. RUPPELT Former Head of the Air Force Project 
Blue Book 
Published by DOUBLEDAY & COMPANY, INC. Garden City, New 
York 
 
Note: This work was originally Copyright ? 1956 by Edward J. Ruppelt. 
This book is now in the public domain because it was not renewed in a 
timely fashion at the US Copyright Office, as required by law at the 
time. 
 
Contents 
Foreword 1 Project Blue Book and the UFO Story 2 The Era of 
Confusion Begins 3 The Classics 4 Green Fireballs, Project Twinkle, 
Little Lights, and Grudge 5 The Dark Ages 6 The Presses Roll--The 
Air Force Shrugs 7 The Pentagon Rumbles 8 The Lubbock Lights, 
Unabridged 9 The New Project Grudge 10 Project Blue Book and the 
Big Build-Up 11 The Big Flap 12 The Washington Merry-Go-Round 
13 Hoax or Horror? 14 Digesting the Data 15 The Radiation Story 16 
The Hierarchy Ponders 17 What Are UFO's? 18 And They're Still 
Flying 19 Off They Go into the Wild Blue Yonder 20 Do They or Don't 
They? 
 
to ELIZABETH and KRIS 
 
Foreword 
This is a book about unidentified flying objects--UFO's--"flying 
saucers." It is actually more than a book; it is a report because it is the 
first time that anyone, either military or civilian, has brought together
in one document all the facts about this fascinating subject. With the 
exception of the style, this report is written exactly the way I would 
have written it had I been officially asked to do so while I was chief of 
the Air Force's project for investigating UFO reports--Project Blue 
Book. 
In many instances I have left out the names of the people who reported 
seeing UFO's, or the names of certain people who were associated with 
the project, just as I would have done in an official report. For the same 
reason I have changed the locale in which some of the UFO sightings 
occurred. This is especially true in chapter fifteen, the story of how 
some of our atomic scientists detected radiation whenever UFO's were 
reported near their "UFO-detection stations." This policy of not 
identifying the "source," to borrow a term from military intelligence, is 
insisted on by the Air Force so that the people who have co-operated 
with them will not get any unwanted publicity. Names are considered 
to be "classified information." 
But the greatest care has been taken to make sure that the omission of 
names and changes in locale has in no way altered the basic facts 
because this report is based on the facts--all of the facts--nothing of 
significance has been left out. 
It was only after considerable deliberation that I put this report together, 
because it had to be told accurately, with no holds barred. I finally 
decided to do it for two reasons. First, there is world- wide interest in 
flying saucers; people want to know the facts. But more often than not 
these facts have been obscured by secrecy and confusion, a situation 
that has led to wild speculation on one end of the scale and an almost 
dangerously blas? attitude on the other. It is only when all of the facts 
are laid out that a correct evaluation can be made. 
Second, after spending two years investigating and analyzing UFO 
reports, after talking to the people who have seen UFO's-- industrialists, 
pilots, engineers, generals, and just the plain man- on-the-street, and 
after discussing the subject with many very capable scientists, I felt that 
I was in a position to be able to put together the complete account of 
the Air Force's struggle with the flying saucer.
The report has been difficult to write because it involves something that 
doesn't officially exist. It is well known that ever since the first flying 
saucer was reported in June 1947 the Air Force has officially said that 
there is no proof that such a thing as an interplanetary spaceship exists. 
But what is not well known is that this conclusion is far from being 
unanimous among the military and their scientific advisers because of    
    
		
	
	
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