To date, the firm conclusions of Project Blue Book are:|
1. no unidentified flying object reported, investigated and evaluated
by the Air Force has ever given any indication of threat to our
2. there has been no evidence submitted to or discovered by the Air
Force that sightings categorized as UNIDENTIFIED represent
technological developments or principles beyond the range of
present-day scientific knowledge; and
3. there has been no evidence indicating that sightings categorized
as UNIDENTIFIED are extraterrestrial vehicles.
- the summary of Project Blue Book, an Air Force study of UFOs from 1950
to 1965, as quoted by James Randi in Flim-Flam!