QARGHULIA, Iraq — Despite persistent sectarian tensions in the Iraqi government, war-weary Sunnis and Shiites are joining hands at the local level to protect their communities from militants on both sides, U.S. military officials say. In the last two months, a U.S.-backed policing movement called Concerned Citizens, launched last year in Sunni-dominated Anbar province under the banner of the Awakening movement, has spread rapidly into the mixed Iraqi heartland. ... "What you find is these people have lived together for decades with no problem until the terrorists arrived and tried to instigate the problem," ..."So they are perfectly willing to...