We’ve heard about the threat to the monuments - but what about the human tragedy? By Robert Fisk When the black-cowled gunmen of the 'Islamic State' infiltrated the suburbs of Palmyra on 20 May, half of Assad Sulieman’s oil and gas processing plant crews – 50 men in all - were manning their 12-hour shift at the Hayan oil field 28 miles away. They were the lucky ones. Their 50 off-duty colleagues were sleeping at their homes next to the ancient Roman city. Twenty-five of them would soon be dead, among up to 400 civilians – including women and children – who would die in the coming hours at the hands of the Islamist militia which every Syrian now calls by its self-styled acronym ‘Daesh’. Oil engineer ‘Ahmed’ – he chose this name to protect his family in Palmyra – was, by chance, completing a course at Damascus University on the fatal day when Palmyra fell. “I was appalled,” he said. “I tried calling my family. It was still possible to get through on the phone. They said ‘Daesh’ (
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