A current piece of news is of the convictions of a couple of people responsible (through gross negligence) of the death of a seven year old girl.
I can hardly imagine the sheer hell of watching my daughter being swept away to her death before me, as happened in this case. A similar thing happened to a colleague, who not only witnessed the death of his daughter but father as well (who died trying to rescue the child), while he was utterly powerless to save them.
Ultimately, this represents one of my greatest fears, the total horror of the prospect of the death of my own daughter. I know the chances of this happening are low, but they are real, through any one of so many reasons. My daughter is one of the few people for whom I know I would kill or die, if that were required.