“Those kids are my kids too,” Mahreen Chowdhury told her husband as she lay dying in hospital. Just hours earlier, the teacher had been standing at the entrance to Milestone School and College in the Bangladesh capital of Dhaka, preparing to hand the second- to fifth-grade students over to their parents. But in a split second, what had been an unremarkable Monday lunchtime turned to horror. A Bangladesh Air Force fighter jet crashed into a two-storey building, bursting into flames.