MOHAMMED AMIN THE refugees trekked for days to cross the border, dodging airstrikes and well-armed soldiers in their country’s escalating civil war. Many are now sleeping out in the open in isolated towns or under trees in a dusty displacement camp unused for decades. As conflict rages in Ethiopia’s northern Tigray region, a fast-growing refugee crisis is building in the eastern provinces of neighbouring Sudan: Almost 40,000 people have sought safety over the past two weeks, and many more are expected in the days ahead. At a newly opened camp and at the two main refugee transit points along Sudan’s border with…