“SOME U.F.O. CASES ARE UNEXPLAINED;
Colorado Report Lists Two Involving Radar Targets”,
10 January 1969 (The New York Times)
The article reports on the University of Colorado UFO Project (1966-1969), informally called the Condon Committee:
http://select.nytimes.com/gst/abstract.html?res=F60E17F93C5E147493C2A8178AD85F4D8685F9
The whole excerpt:
“Although plausible explanations have been found for a great majority of unidentified flying objects, or U.F.O.'s, the University of Colorado study made public yesterday discloses several extensively documented cases that seem to defy explanation.”
(wikimedia.org image)