Sitting beside a woman in Bangladesh, watching the tears roll down her cheeks, I searched for some words of comfort. But none came. This bereaved mother, Hosna, was bravely recalling the day that her 11-year-old son, Emamul drowned in front of her very eyes. He was just playing beside a calm and still river bank when he fell in. He had no idea how to swim so, within minutes, he was gone. It goes without saying that Hosna's story is devastating. No mother should have to face the death of their child. But what I found most difficult to comprehend is that she's just one of 50 grieving mums who lose a child in this way every single day across Bangladesh alone.