In his famed book "The Art of War," Chinese general Sun Tzu wrote 2,500 years ago: "War is all deceit. If you can do something, make the enemy believe you cannot; if you are close, pretend you are far away." Last week in Iraq both sides were playing Sun Tzu to the limit: The allies faked weakness and disarray, the Iraqis faked strength and confidence.

The question that arises is basically a political one for the Iraqis. Once they use chemicals, if they do, they will not only lose a lot of ground in the propaganda war in the Arab world and even more in Europe, they will also confirm a lot of the rationale for American action. So, for them, it must be a difficult calculation. If they have hopes of dragging this out in a guerrilla war or some urban fighting then you'd expect they wouldn't do it -- it would be counterproductive, since they believe they have some hope of eventually wearing America down and turning world opinion further against us. On the other hand, if they think they're on the verge of complete collapse -- which looks like a distinct possibility -- then they may be in 'go down in blaze of glory' mode.