Oh for Christ’s sake. JFK?!? Please actually read the Warren Commission Report.Red Leg here's a couple of examples of the US government being able to keep secrets for a long time.
".........The notion that the US government could keep such a secret coverup for three decades is farcical. ......."
President Kennedy (JFK) was assassinated in 1963 although little by little more information on his assassination has been released the US government is still covering it up after nearly 6 decades.
Then there is Area 51, built in 1955, that's nearing 7 decades.
Of course there are the Clintons secrets, ie laptop, emails, how many blow jobs that president Clinton in the White House, Benghazi, why so many of "their friends" committed suicide, conveniently had fatal accidents, etc.
And who knows how long if ever Hunter Biden's information on his laptop will be exposed or who was the master mind behind the fraudulent 2020 presidential election.
And what part of about Area 51 - that the military has a classified test facility or little green men?
Again, the idea that a three agencies of the US government could hide an accidental shoot down of a domestic airliner is preposterous. I don’t care who was running for re-election.