** FILE ** John Lennon and his wife Yoko Ono raise their fists as they join a protest in front of British Overseas Airways Corp. offices in New York in this Feb. 5, 1972, file photo. The demonstrators called for the withdrawal of British troops from Northern Ireland.The FBI has released its final surveillance documents on Lennon to a university historian who has waged a 25-year legal battle to obtain the secret files. The 10 pages contain new details about Lennon's ties to leftist and anti-war groups in London in the early 1970s, but nothing indicating government officials considered the former Beatle a serious threat, historian Jon Wiener told the Los Angeles Times in Wednesday's editions,Dec. 20, 2006. (AP Photo/Ron Frehm, file)