JFK killed because of his knowledge about aliens?

New uncovered top secret documents suggest that JFK was killed due to his interest in UFOs and Aliens. Obviously he either knew too much or was close to knowing what even the president is not supposed to know.  John F. Kennedy demanded the release of secret alien files of the CIA. Ten days later he was murdered. New  documents show: JFK wanted to know what is available in the U.S. secret UFO files held under lock and key. The writing is on the 12th Dated November 1963 and addressed to the CIA headquarters.
Read these top secret classified documents to find out: