Time is running out for US President Donald Trump to sign-off on the trove of classified documents detailing the killing of John F. Kennedy.
The 35th President of the United States was shot dead while riding in his motorcade in Dallas on November 22, 1963.
US government officials at the National Archives need the official approval of Trump to begin releasing the 35,000 documents.
But the memo needing to be signed off by the US President has still not made it to his desk in the White House, reports NBC.
This is reportedly due to the CIA, FBI and other state agencies making last minute redactions to the trove of files.
Reportedly CIA bosses filed their requests on time, while other agencies are still trying to get details of their redactions across to archivists.
Trump has been talking up the release of the files, which comes as the deadline set in the John F. Kennedy Assassination Records Collection Act is due to expire after 25 years.
It is then up to the sitting US President to decide whether or not to publically release the documents.
The US President has been hailing the release of files on Twitter, describing it as “so interesting”.
He tweeted: “I will be allowing, as President, the long blocked and classified JFK files to be opened.”
But theories have long persisted there may be more to the story, including internal plots by the FBI and CIA, the Soviet Union and Cuba.