JFK signed the MEMO ordering the CIA to share all UFO information with the Soviets 10 days before his assassination.

Copy of the November 12th 1963 JFK MEMO here: http://jmp.sh/b/f4zD8fiIpQbE0G4rKPaU
On November 12th 1963 President John F. Kennedy sent a request to the CIA to release necessary UFO files. He never got to see his request approved or rejected as he was assassinated only 10 days later.