Six years ago, more than a million migrants traveled across the Mediterranean and Europe to reach Germany — many of them Syrians escaping the civil war. So, could history repeat itself as refugees try to flee Taliban rule in Afghanistan? As Henry Ridgwell reports from Berlin, immigration is high on the agenda as Germany prepares for a general election later this month.Camera: Henry Ridgwell, Memet Aksakal   Produced by: Henry Ridgwell, Mary Cieslak