Let me share an excerpt from a report on the CIA's web site here.

Starting on page 73:

Not only did the airline pilots report their sightings to air-traffic controllers, but they and ground based observers also wrote letters to the Air Force unit at Wright Air Development Command in Dayton charged with investigating such phenomena. This in turn led to the Air Force's Operation BLUE BOOK. Based at Wright-Patterson, the operation collected all reports of UFO sightings. Air Force investigators then attempted to explain such sightings by linking them to natural phenomena. BLUE BOOK investigators regularly called on the Agencies Project Staff in Washington to check reported UFO sightings against U-2 flight logs.... U-2 and later OXCART flights accounted for more than one-half of all UFO reports during the late 1950s and most of the 1960s.

This stuff is really ancient. Why are they still withholding them? I would especially like to see the communication regarding the 1966 portage county UFO chase involving several police departments. It was so epic it became the basis for the chase scene in Close Encounters of the third kind.

Whatever that project was is certainly ripe for declassification in this day and age. If you have anything to add, please chime in /u/blackvault/

Note: This post may seem too fringe for some, but these things really did happen. The cops really did chase a mystery craft around. The Air Force really did act very suspicious in responding to it. The CIA really was involved in project BLUE BOOK. I am hoping the previously mentioned DoD directive on automatically removing SAP status will enable historians at the US Air Force Historical Research agency to get to the bottom of this once and for all.