This program vividly dramatizes and explores the kinds of choices that public officials, health care workers, law enforcement, journalists and citizens may all have to confront in the case of a biological attack.

If terror is as much an attack on the psyche of a population as on the physical and human resources, then biological attack is probably the most dreaded weapon in the terrorists' arsenal. This program vividly dramatizes and explores the kinds of choices that public officials, health care workers, law enforcement, journalists and citizens may all have to confront in the case of a biological attack. And questions that before may have sounded abstract or arcane suddenly spring urgently to life: who is in charge of the response - health officials, elected officials, law enforcement? With many thousands at risk, who gets treated, how and where, and who decides? How is panic controlled? If a citizen wants to leave town, can she? Who will stop her? What other city or state will let her in? Cynthia McFadden, chief legal correspondent for ABC News, moderates.