WASHINGTON, Dec. 15 (UPI) -- In an interview in Washington, actor Matt Damon suggested that President George W. Bush's daughters "maybe" should join the military. Damon and actor Robert De Niro were guests on the MSNBC cable show, "Hardball with Chris Matthews," promoting their upcoming movie, "The Good Shepherd." Directed by De Niro, the film is an account of the early history of the CIA. During the interview, scheduled to air Monday, Damon talked about the fairness of fighting the war in Iraq with a volunteer Army. "I don't think that it's fair as I said before, that it seems...