+ No UFO reported, investigated, and evaluated by the Air Force was ever an indication of threat to our national security;
+ There was no evidence submitted to or discovered by the Air Force that sightings categorized as "unidentified" represented technological developments or principles beyond the range of modern scientific knowledge; and
+ There was no evidence indicating that sightings categorized as "unidentified" were extraterrestrial vehicles.
UFO != "fake" or alien. UFO encompasses anything that couldn't be readily identified. Be it a weather balloon, experimental craft or something a pilot caught a fleeting glimpse out of the corner of their eye. If the pilot is unable to identify it even due to lack of knowledge, it is deemed unidentifiable. No aliens or conspiracies required.
I mean sure, there could be aliens or conspiracies involved, but it seems unlikely given how poor people are at keeping even the smallest secret.
https://en.wikipedia.org/wiki/Project_Blue_Book