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(FILES) A picture taken on May 11, 1996 shows Manchester United's Eric Cantona (L) controlling the ball by Liverpool's John Scales during the final of the FA Cup at Wembley. Sir Alex Ferguson celebrates 25 years in charge of Manchester United on November 6, 2011, undaunted by the possibility that the greatest challenges of an extraordinary career may yet lie ahead of him. AFP PHOTO GERRY PENNY