The US government has released 2,800 previously classified files on the assassination of President John F Kennedy in 1963.
President Donald Trump said the public deserved to be “fully informed” about the event, which has been the subject of various conspiracy theories.
But some documents have been withheld at the request of government agencies.
One memo revealed that the FBI had warned police of a death threat against the assassin Lee Harvey Oswald.
“We at once notified the chief of police and he assured us Oswald would be given sufficient protection”, writes the FBI director J Edgar Hoover.
Oswald was shot dead in the basement of the Dallas Police department two days after President Kennedy was killed.
As the documents are pored over and analysed, other findings include a 1964 FBI memo in which Cuban exiles debate how much an assassination of Fidel Castro would be worth. “The $150,000 to assassinate Fidel Castro plus $5,000 expense money was too high,” it says.
Another memo showed that Soviet officials feared an “irresponsible general” would launch a missile at the USSR in the wake of President Kennedy’s death.
A 1992 law passed by Congress required all records related to the assassination of President Kennedy – around five million pages – to be publicly disclosed in full within 25 years.
The deadline was Thursday.
More than 90% of the files were already in the public domain.
Allegations of a government cover-up are unlikely to be assuaged by reports that the CIA, FBI, Department of State and other agencies lobbied at the last minute to keep certain documents under wraps.
