Senate Armed Services Committee Chairman John Warner urged Rep. Jack Murtha on Sunday to stop prejudging allegations that U.S. Marines massacred 24 Iraqi civilians after their convoy was attacked by a IED last November. Asked about Murtha's claim that Marines executed residents of the village of Haditha "in cold blood," Sen. Warner told ABC's "This Week": "At this time, particularly on Memorial Day . . . I think we should be calm and reassuring to the American people that the men and women of our armed forces are admirably and professionally conducting their heavy responsibilities." The top Republican said: "I...