Images of a wall being built at Turkey's border with Iran to prevent a new refugee flow, mainly from Afghanistan as the Taliban take over the country. For now, a 5km section of the 3 metre-high wall is under construction, and Turkey is aiming to build a 295km long wall on its Iranian border, beefed up by barbed wires and trenches. Turkey, which is already home to 3.7 million Syrians who fled the war, fears another influx of refugees from Afghanistan. IMAGES