By KATARINA KRATOVAC, Associated Press Writer TIKRIT, Iraq - U.S. soldiers stormed three houses near Saddam Hussein's hometown on Saturday and detained four suspects, two believed linked to the ousted leader's special security force, the U.S. military said. Also Saturday, U.S. troops of the 4th Infantry Division arrested seven suspected insurgents and seized about 50 Kalashnikov rifles during raids near Baqouba. Iraqi firefighters also extinguished a blaze at a pipeline in northern Iraq. Officials suspected sabotage. During one of the Tikrit raids, troops questioned a man in his 50s who a U.S. commander said had worked in Saddam's Special Security...