U.S. forces in this northern city bombed a suspected enemy staging area Monday and conducted house-to-house searches as the military continued a nationwide show of force aimed at halting the expansion of the insurgency and capturing its organizers and financiers. The drive to intimidate the insurgents included the firing of a missile carrying a 500-pound warhead at a target near Tikrit — the second use of such a weapon in as many days. So far, however, the effect of the firepower is unclear, with the number of attacks on coalition forces holding about steady at 26 in the last 24 hours, a military spokesman said. Full Story