World: Czornonoh told US British Ambassador how he kept on warning authorities about Oswald's plan to murder JFK multiple times, according to the documents.

Did US State Department 'ignore' a grave warning that could have saved JFK? Here's what the document reveals

Nearly 3,000 declassified files relating to the assassination of former US President John F Kennedy were released in October

Shocking revelations from recently released John F Kennedy assassination files

Nearly 680 records were made public including 553 never-before-seen files from the Central Intelligence Agency, which had objected to their release previously on national security grounds

CIA releases more than 500 secret Kennedy assassination files

Academics who have studied Kennedy's killing on Nov 22, 1963 said they expected the?final batch of files to?offer?no major?new?details?on why Lee Harvey Oswald gunned Kennedy down

John F Kennedy assassination: Final files on investigation to be released