The family home of Tarkhan Batirashvili/Abu Omar al-Shishani in the village of Birkiani. He hasn’t been seen in the Pankisi Gorge since being released from jail and going to Turkey in 2012, and is now understood to be the leader of a radical group fighting in Syria. Photograph: Daniel McLaughlin

Like tearaways in the west gunning their cars away from the lights, the young Kists spurred on their steeds and tore off down Duisi’s main street. (...)