The John Lennon FBI file and INS letters

The second page of the FBI's Letterhead Memorandum of Feb. 22, 1972 (see Page 1), had also been withheld in its entirety from 1981 until 2006 under the claim that releasing it could lead to "military retaliation against the United States." This page conveys information, presumably from Britain's MI5, that Lennon "has encouraged the belief that he hold revolutionary views. . . by the content of some of his songs." This seems to be a reference to Lennon's song "Power to the People" -- hardly a national security secret.