Did the official investigation into UFOs prove or disprove their existence?

In October of 1966, Dr. Edward Condon was selected by U.S. Air Force to head a $500,000 study about Unidentified Flying Ojebcts. In an effort to maintain a neutral investigation it was assigned to the University of Colorado.
The University gathered a team of 11 eminent scientists. They were to analyze and make public their conclusions of the most compelling UFO cases.

Case 2:

Lakenheath, England
August 13-14, 1956
In conclusion, although conventional or natural explanations certainly cannot be ruled out, the probability of such seems low in this case and the probability that at least one genuine UFO was involved appears to be fairly high.

Case 21:

Colorado Springs, Colorado
May 13, 1967
This must remain as one of the most puzzling radar cases on record, and no conclusion is possible at this time.

Case 46:

McMinnville, Oregon
May 11, 1950
This is one of the few UFO reports in which all factors investigated -- geometric, psychological, and physical -- appear to be consistent with the assertion that an extraordinary flying object, silvery, metallic, disk-shaped, tens of meters in diameter, and evidently artificial, flew within sight of two witnesses.
While the panel of scientist conducted an objective investigation, the project leaders appeared biased and ignored the data. Dr. Condon stated that nothing has come from the study of UFOs that has added to scientific knowledge.

 

The investigation was published as the Scientific Study of Unidentified Flying Object.

Dr. Condon’s conclusions are still being cited by the U.S. Air Force as an excuse to prevent further official scientific investigation.

Out of 63 cases investigated, 29% remain unexplained to this day.