Roadside bombers killed seven U.S. troops in one day, four of them in a single blast near Baghdad, and three other soldiers died of other causes — raising to at least 30 the number of American soldiers killed this week, the Associated Press reported. Explosions aimed at U.S. patrols that kill several troops at once are common, but the recent frequency of such large-scale attacks may signal militants are using larger bombs or explosively formed penetrators, known as EFPs, as they fight back against a series of U.S. military operations. The military has staged a series of counterattacks this week on roadside bomb factories and insurgent strongholds where stockpiles of explosives have been uncovered.
