BAGHDAD, Iraq (AP) A suspected chemical weapons warehouse exploded in flames Monday moments after U.S. troops broke in, killing two soldiers and wounding five. Jubilant Iraqis swarmed over the Americans' charred Humvees, waving looted machine guns, a bandolier and a helmet. In Fallujah, U.S. troops battled insurgents in the latest violation of a tentative cease-fire for the besieged city. One Marine and eight insurgents were killed. Marines fought Sunni guerrillas around a mosque in Fallujah's Jolan district, a poor neighborhood where insurgents are concentrated. Helicopter gunships joined the battle, which sent heavy black smoke over the city. Tank fire demolished...