Regents professor Paul Keim is featured in a PBS Frontline report released this week on the 2001 anthrax letters that were sent 10 years ago shortly after the 9/11 attacks.

Keim played an integral role in the investigation into the attacks that killed five and sickened 17. Bruce Ivins, an Army biodefense researcher at the U.S. Army Medical Research Institute for Infectious Diseases in Frederick, Md., committed suicide as federal agents were preparing to charge him with carrying out the attacks.

Watch clips from the Frontline episode, “The Anthrax Files,” here.

Read an edited transcript of Frontline’s interview with Keim, conducted on June 27, 2011.