I have a friend who is a well-known biochemist. I told him that I was puzzled by the need to determine whether or not the recent attack in Syria was an attack using chemical weapons. I asked him if he could think of anything other than chemical weapons, or a neutron warhead, that could cause the death of a great many people within minutes without trauma. He was stumped. Aljezeera quotes a British representative to the U.N. as saying that the probability of the opposition carrying out an "attack of this scope is vanishing to near zero." So my questions are if it wasn't Assad who did it, who else could have done it; and if it wasn't chemical warfare, what could it have been?