Hassan Koko sits on top of a homemade wooden bed, overlooking the majestic hills of the Nuba Mountains in South Kordofan, Sudan . Despite the spectacular view and a comforting late afternoon breeze, he looks uneasy. On November 29, the 50-year-old community health worker had finished a training course and was enjoying some sweet tea when a drone suddenly appeared. When it landed, it killed a number of Koko's colleagues. "The drone struck once, then came back again, hitting those who were already wounded," he tells DW. Hassan Koko stands on crutches overlooking the landscape from his village near Gidel in South Kordofan Image: Marco Simoncelli While Koko himself survived, the attack left a heavy mark on him. Quite physically so. He points to his left knee. Inside it, remains a sharp metal object, now three months after the attack, clearly visible.  "My family was happy I survived. They thought I would die," he says. "But life is not the same anymore.…