FALLUJAH, Iraq Two U.S. armored vehicles prowled slowly at dusk along the route known as Highway 1 outside Fallujah, one of the most dangerous towns in all of Iraq for American soldiers. Two soldiers manning the turrets, along with a pair sticking out the rear hatches of each Bradley fighting vehicle, scanned the sand and debris, searching for hidden roadside bombs. The lead track approached a spot where a median guardrail had been torn down. The vehicle slowed to a crawl as the soldiers searched for wires, disturbed ground, anything unusual that might indicate a hidden bomb. "They like to...