Revelations by Edward Snowden about the National Security Agency sparked a national debate about the ethical and legal dilemmas related to government surveillance. We'll look at the NSA operations since the 9/11 attacks with investigative journalist Michael Kirk, a producer of the new PBS Frontline two-part documentary, "United States of Secrets," and with Michael Greenberger, director of the University of Maryland's Center for Health and Homeland Security and professor of law at the University of Maryland’s Carey School of Law.
The NSA post 9/11
