MOSUL, Iraq (Reuters) - U.S. troops stormed a house in the northern Iraqi city of Mosul on Tuesday and said they killed four high-ranking allies of Saddam Hussein. Some 200 soldiers blasted the villa with machineguns and rockets during a four-hour battle before storming in to find four bodies, U.S. officers said. They declined to identify them or comment on local rumors Saddam's sons might have been present. The U.S. forces have been conducting an intensive hunt for the fugitive former dictator himself, spurred on by guerrilla attacks they blame on his die-hard supporters. Another American soldier was killed on...