analyst and retired army major general bob scales. general, we are told that these sarin delivery systems have been prepared. apparently, you know more about this than i do, but apparently sarin is a powder, you mix it with alcohol, then it becomes live and deadly, but it's only good for about two months. >> yeah, that's right, jon. that's why it's kept in what's called binary form. the chemical and alcohol mixed together, you have a very, very deadly gas. sarin is, essentially, nerve gas, and it is supplied by the soviet union, it's intended to be delivered principally by soviet-style scud rockets. and, essentially, when you fire explode over the target, they set up a cloud, if you will, of deadly gas. and in the middle east iraq has used it twice, once against their own people and once against the iranians, and so