(The Guardian) – Water bottle in hand and rucksack on back, his grey trousers rolled up to reveal spindly legs, 12-year-old Gatwech boarded the first flight of his life. His ear protectors dwarfed his head as he gazed wide-eyed through the window of the Russian-built UN helicopter that lifted into the sky, sweeping over lush plains and thick forests. Gatwech crossed the invisible frontlines separating government and rebel forces in South Sudan’s civil war. Finally, the aircraft came in to land on a ringfenced field in the village of Akobo, deep in opposition territory, and the boy strained to look at the excited crowd waiting under trees. He was about to be reunited with his family for the first time after nine arduous months in a displacement camp.