The government has been studying UFO's at the highest levels since at least 1947 and likely prior. You don't study something closely for 7 decades and not learn anything.
"You don't study something closely for 7 decades and not learn anything..."
I do believe that any qualified historian of science could point out to you topics in linguistics (origin of language), psychology (nature of consciousness), astrophysics (what's inside a black hole, if anything), and many other topics where more than 7 decades have gone by, with lots of smart people studying a topic, and yet at the end of that much time practically nothing has been learned.
I believe the last 2 points because I don't believe that credible military personnel with long and distinguished careers, would tarnish their reputations terribly for no apparent gain, especially near the end of their lives.
Check out Philip J Corso or Robert Salas, but there are , many, many others who have blown the whistle including Walter Haut the public affairs officer during the Roswell crash (and recovery).
I don't know, certain end of life seems to be the perfect opportunity to publish all that fantastic evidence that would mark the most important distinguishable moment for humanity as a whole so far.
https://www.cia.gov/library/center-for-the-study-of-intellig...