Prime Minister Brian Mulroney gives a thumbs up sign as he and President Ronald Reagan pose during arrival ceremonies Sunday, March 17, 1985 at the Quebec City Airport. (CP Photo/Scott Applewhite) ...

Former President Ronald Reagan arrives at his office in Los Angeles on Feb. 6, 1997, one of his last public appearances, three years after being diagonosed with Alzheimers. (AP Photo/Nick Ut) ...