In this program, an eye-opening documentary on the National Security Agency (NSA) by best-selling author James Bamford and Emmy Award-winning producer Scott Willis, NOVA exposes the ultra-secret intelligence agency's role in the failure to stop the 9/11 attacks and the subsequent eavesdropping program that listens in without warrant on millions of American citizens. "The Spy Factory" is based on Bamford's best-selling 2008 book, The Shadow Factory, praised as "important and disturbing" in the Washington Post by former senator Bob Kerrey, who was a member of the 9/11 Commission. [EDIT]