This is a great FOIA release by the CIA on their own website.
Read pages 72 and 73, in it the CIA explains how Project Blue Book was created to mask U2 and Oxcart flights in the 1950′s and 1960′s.
THE SMOKING GUN UFOS ARE REAL
The U2 flights could only account for about 50% of the UFOS.
Then the CIA admits they used the cover of ‘natural phenomena’ to not reveal at least half of the UFOS spotted and reported by pilots in the 50′s and 60′s were not really the U2.
THEY ADMIT TO PUBLIC DISINFORMATION