One of the most dreaded weapons in the terrorist’s arsenal can be delivered in a paper envelope. Vividly exploring situations that public officials, health care workers, and law enforcement personnel would have to confront in the event of a biological attack, a panel of experts wrestles with questions that have gone largely unanswered in the public record: Who among America’s leadership is in charge of the response? Who gets medical treatment, and who decides? Must the affected city be quarantined? Will people be prohibited from leaving? Moderated by ABC News Chief Legal Correspondent Cynthia McFadden, this Fred Friendly Seminar lays bare the central issues of homeland security and the possibility that a biological attack would turn America into a much different place overnight. Additional resources are located online at www.pbs.org/inthebalance/terrorism. (57 minutes)