Public reaction to risks is guided more by a dread of what is unfamiliar, unknown, or poorly understood than by any comparative appraisal of actual consequences. When these strong emotional reactions are involved, people focus excessively on the possibility of a dreaded outcome (death by a terrorist attack or by a viral pandemic) rather than trying to keep in mind the probability of such an outcome taking place.100 Terrorists have always exploited this reality, forcing governments to take extraordinarily costly steps to prevent further attacks while repeatedly neglecting to take measures that
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