J.M. Berger, investigative journalist and terrorism consultant, discusses his article “Patriot Games: How the FBI spent a decade hunting white supremacists and missed Timothy McVeigh;” how years of bad reporting have muddied the waters of the Oklahoma City bombing story; the FBI’s PATCON operation of infiltrating (and possibly inciting) the radical right in the 1990s; sorting out the real members and government provocateurs within the Aryan movement; and how the government’s current...