https://sgp.fas.org/library/ciaufo.html
https://lareviewofbooks.org/article/the-truth-was-out-there-on-the-legacy-of-art-bell
https://www.nytimes.com/1997/08/03/us/cia-admits-government-lied-about-ufo-sightings.html
I should say, this is mostly speculation based on reading a lot of COINTELPRO and MKULTRA stuff, it seems likely a way to test obsfoucating military technology through misinformation.
Furthermore if you notice the global UFO reported sightings, it seems to only line up with where American media has a hegemony, which is strange considering China has nearly 2 billion people in it, you’d think one of them might have seen one; it seems to only be where american media has reach that ‘UFOs’ start to appear and I dont think thats an accident.