September 11, one year on: in retrospect

We are close to a year on from September 11. The main consequence is clear: the attacks on mainland America have provoked the United States into a new strategic campaign, likely to dominate US foreign policy for a long time to come. The impact will be protracted not only because of the broad ramifications of this policy, but because the very goal - the elimination of an enemy, unseen and drawing on considerable support - will remain elusive.