Thousands of families fleeing Iraq’s western city of Ramadi choked checkpoints leading to Baghdad on Friday, after an Islamic State advance spread panic and left security forces clinging to control. A column of traffic several vehicles wide snaked for miles at a checkpoint in Sadr al-Yusufiyah, on the edge of Baghdad province, as minibuses, cars and trucks picked up families who crossed by foot carrying their possessions in bags and wheelbarrows. Suhaib al-Rawi, the governor of Anbar province, of which Ramadi is the capital, described it as a human disaster on a scale the city has never witnessed. U.S. and Iraqi officials have warned that the city is at risk of falling to the Islamic State despite seven months of airstrikes by U.S. planes in Anbar. Such a loss would be a serious blow to Iraq’s government, which recently announced a military campaign for the province […]