Washington's role in the run up to this tragic day will continue well beyond that. Even as the smoke still lingered in Rawalpindi, President Bush demanded that those responsible for Bhutto's death be caught and punished. "The United States strongly condemns this cowardly act by murderous extremists who are trying to undermine Pakistan's democracy," Bush told reporters in Crawford, Texas, where he had arrived Wednesday to begin a long New Year's holiday. "Those who committed this crime must ...