As his tanks and artillery stormed the eastern Syrian town of Deir al-Zour, killing 70 civilians in one day, the US and Turkey Sunday night, Aug. 7 began to turn the screw on President Bashar Assad: US Secretary of State Hillary Clinton asked Turkey's foreign minister Ahmet Davutoglu to press Syria to "return its military to the barracks," during his visit to Syria Tuesday. The Syrian ruler with Iranian backing spurned the ultimatum even before the minister reached Damascus.