Jul 20 Watch Frontline: Evidence Questioned in 2001 Anthrax Case Hari Sreenivasan talks to Frontline's Michael Kirk about new evidence in the anthrax case.
World Aug 07 Watch Years After Anthrax Attacks, Bioterrorism Threat Still Looms As the probe into the 2001 anthrax attacks comes to a close, the country still faces challenges preventing and responding to bioterrorism attacks. Experts assess U.S. preparedness.