Five years after the attacks on 9/11 and the massive, multibillion-dollar reorganization of government agencies which followed, FRONTLINE and New York Times reporter Lowell Bergman investigates the domestic counterterrorism effort and asks whether we are any better prepared to prevent another catastrophic attack. Relying on interviews with high-level sources in the U. S. government, Bergman looks into the major cases brought inside the United States and reveals troubling flaws in what has been the largest reorganization of the government in half a century. The documentary focuses on who is the real enemy within the United States and whether we are prepared to defeat him.