Iraqis have tried to stop the U.S. advance by charging with dump trucks, pickup trucks and buses filled with Iraqi soldiers firing their weapons, according to reports from CNN correspondent Walter Rodgers, embedded with the 3rd Squadron, 7th Cavalry, near the airport. The Army calls the soldier-filled vehicles "suicide buses," Rodgers said. U.S. tanks easily destroy the Iraqi vehicles, he said. At least one of the buses blew up as if it had explosives inside, Rodgers reported.