ARLINGTON, Va. -- President Bush, delivering a Memorial Day message surrounded by the graves of thousands of military dead, said Monday that the United States must continue fighting the war on terror in the name of those have already given their life in the cause. "The best way to pay respect is to value why a sacrifice was made," Bush said, quoting from a letter that Lt. Mark Dooley wrote to his parents before being killed last September in the Iraqi city of Ramadi. Monday's observance at Arlington National Cemetery was not a funeral, so demonstrators were free to speak...