I understand no more than anyone, no more than this: at some level I believe this administration does not even know why it chose Iraq. I believe it cannot even remember the reasons. The reasons have changed so many times - at least in public - and make so little palpable sense that it is, of course, tempting to believe, as conspiracy theorists will always believe, that there is some hidden reason which is being kept from us. But to me, the more frightening possibility is this: what if no such reason exists? If there is indeed, no casus belli?