30Homs Governorate, Syria The same pair of guards returned for Aslan Terzi. After he was unshackled from the cot, his wrists were secured in front by a zip tie. They marched him out, in the opposite direction from the studio. There were more open doorways. Through one, he glimpsed a high-tech space. Racks of servers, their front panel green LED indicators blinking rapidly, a long table with five laptops and a confusion of cables, and thicker, black cables snaking on the floor. One of the reasons for IS’s success was its mastery of Internet technology to promote the group’s ideology, advertise and move funds. Terzi had heard rumours of a secret site — the nerve centre — of the terror outfit’s online presence. No more a rumour, he thought, as he went past the room. But where was he? Would

