THE PRICE OF FANATICISM

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In the world's great cities, the prospect is far more uncertain. In Tokyo the police had a wealth of signals that a major nerve- gas attack might be in the making but were still caught off guard when it came. Some counterterrorism officials are speaking of the Tokyo subway poisoning as a "wakeup call'' for governments around the world. But it is also possible that the gas attack in Tokyo was only a preview of what is yet to come.

--Reported by Barry Hillenbrand/London and J.F.O. McAllister and Mark Thompson/Washington, with other bureaus