Or, perhaps the canoe 'accident' that killed the former head of the CIA, William Colby, in 1996.
Upon its release in 1964, all files of the Warren Commission were sealed from public view for 75 years (until 2039) by executive order of President Johnson. According to the Assassination Records Review Board, Kennedy assassination related documents that have not been destroyed are scheduled to be released to the public by 2017.
This isn't very clear, is it. What records have been destroyed, and why? Which records are to be released in 2017 and which in 2039?