When anthrax-laden letters began appearing in the mail just days after the terrorist attacks of September 11th, all eyes looked to al Qaeda * But could the culprit be at the heart of the American bioweapons and intelligence communities? * Follows the grim course of a rampage conducted by mail and the ongoing investigation to catch the killer through analysis of the deadly pathogens and the letters themselves * Interviews include forensic experts at the FBI and Centers for Disease Control and Prevention, as well as Dr. David Franz, former commander of the U.S. Army Medical Research Institute of Infectious Diseases; Dr. Paul Keim of Northern Arizona University, the worlds leading anthrax authority; and Don Foster, a professor of English at Vassar College who uses grammar analysis to solve crimes * 60 min. * Available in US and Canada only