Really Pathetic Silver Linings.

I've heard that suicide rates drop when there's a war on so this isn't entirely surprising:

British scientists analysed the suicide rate in England and Wales after the September 11th attacks in America and again after the July 7th bombings in London.

After both attacks the number of suicides dropped by 40 per cent.

So in theory if the suicide rate declines by more than the number of victims does this mean that the terrorist attacks save lives? I guess this is why pure utilitarianism doesn't work as a moral theory.