S32 E11: United States of Secrets (Part One)

Aired: 5/11/2014 | 1:54:11 | Episode
How did the government come to spy on millions of Americans? In United States of Secrets, FRONTLINE goes behind the headlines to reveal the dramatic inside story of the U.S. government's massive and controversial secret surveillance program -- and the lengths it went to try to keep it hidden from the public.