All killing is abhorrent and one life is worth as much as any other. But while the lives lost are the same it is not true that the use of chemical weapons to kill is the same as conventional weapons; the difference is that one is banned and the other is not, their use makes intervention possible in a way it is not during a conventional conflict. The threat from chemical weapons is also of an order of magnitude greater than that of conventional weapons. They can kill immense numbers quickly and indiscriminately. The use of chemical weapons is an escalation that must not be allowed to happen.