The fundamental question prior to the war was what tolerance for risk did U.S. policy makers have after 9/11. This expert emphasized that the amount of WMD needed to kill thousands in a terrorist attack, as opposed to the amount needed for large-scale military purposes, was miniscule and probably too small to be reliably detected even in the best of conditions. Knowing that, should Saddam have been allowed to continue in his defiance of the U.N. and the international community? The lesson here is that if you run a rogue regime dependent on maintaining the reality or creating the very plausible impression of having WMD in order to stay in power, you are going to be in a lot of trouble in the post-9/11 era. Rightly.