Turning the true story of a 1944 attempt by German army officers to assassinate Adolf Hitler into a movie presents one considerable problem: The attempt failed, and everybody knows it. Conversely, "The Day of the Jackal," the 1973 film about an attempt to assassinate French president Charles DeGaulle, worked because the story was fiction — the movie was really a straightforward thriller that derived its tension from the cat-and-mouse interplay between a wily assassin and an intrepid police inspector. The German scenario, being rooted in real life, is less tidy. It involved a large cast of conspirators and a certain amount of muddling bureaucratic complexity. However, it also offers a real hero around which to construct a film — a handsome young colonel named Claus von Stauffenberg, who coordinated the assassination attempt and might have pulled it off had it not been for the intrusion of, well, real life.