The U.S. National Archives on Thursday released about 13,000 documents related to the 1963 assassination of President John F. Kennedy, an event that shocked the world and sparked countless speculations to this day, AFP reported.

But the White House, citing national security, has blocked the release of thousands of other documents. The package from the archive on this case was already declassified in December 2021.

According to the National Archives, 97% of the file’s approximately five million pages are now available.

Democratic President Joe Biden said in a memo that a “limited” number of documents cannot be released, a measure that is “necessary” to “prevent harm to military defense, intelligence operations, law enforcement, or foreign policy.”

The assassination of the popular American president on November 22, 1963 in Dallas, Texas has spawned numerous conspiracy theories fueled by hundreds of books and films such as Oliver Stone’s JFK (1991).

They reject the findings of the so-called “Warren Commission,” which determined in 1964 that Lee Harvey Oswald, a former Marine living in the Soviet Union, acted alone in the assassination of President Kennedy.

Some believe that Oswald was used by Cuba or the USSR. Others believe that the assassination was ordered by the Cuban opposition to Castro, with the support of the US Secret Service and the FBI, or by opponents of JFK in the US.

In 2017, Donald Trump released the case files under a 1992 congressional law that required all documents related to President Kennedy to be released for 25 years.