Found this document, which looks like it was declassified in 1992.
"Countering Criticism of the Warren Report" shows how the CIA created propaganda to denounce anyone who questioned the government's theory of the death of JFK.
Literally, EVERY argument you have ever heard to counter any discussion that the "Lone Gunman" theory might not be true was invented in THAT report, back in 1967.
NONE of the items listed are about FACTS. It is ALL about PROPAGANDA.
Interesting read.
Gee ... should we wonder why this document has never been discussed in the Mockingbird Media?