ON ALERT:
Posters in London urge public watchfulness
The brave reaction of Madrileños caught in the bomb attacks of 3/11 proves how resourceful people can be in the face of terror even if they're unprepared. Public vigilance and advance planning can't eliminate the risk of attack, of course, but they can make plots more difficult to launch; they can help mobilize a fast, effective response if terrorists do strike; and not least they can help people overcome their feelings of powerlessness. So in the wake of the Madrid atrocities, governments and disaster-relief agencies are re-emphasizing what ordinary people can do to help foil a potential terrorist...