U.S. forces operating in the Sunni Triangle -- the region of Iraq most loyal to captured Saddam Hussein -- found a significant weapons cache that included al Qaeda literature and videotapes, the U.S. military said Tuesday. Members of Task Force Ironhorse discovered the material Monday morning at a site in Samarra, about 65 miles north-northwest of Baghdad. Some of the items were found hidden in a false wall, the military said. In addition to the al Qaeda literature and videos, the troops found nearly 8,000 rounds of ammunition; 160 mortar rounds and six mortar tubes; 43 rocket-propelled grenade launchers and...