text: Some Iraqi Insurgents Turning in Weapons BAGHDAD, Iraq - Shiite fighters in tracksuits and sneakers unloaded cars full of machine guns, mortars and land mines Monday as a five-day, weapons-for-cash disarmament program kicked off in Baghdad's Sadr City district - a sign of progress in the center of Shiite resistance in Iraq.    A lasting peace in the sprawling slum would allow U.S...