We usually think of terrorists as people from "other" countries. But domestic terrorism, by foreign nationals on visas and by U.S. citizens alike, is also a huge problem.

Cast: Jonathan Adams, Barry Aird, Leonard Cole, Michael Downing, Gregg Housh, Jon Iadonisi, Daryl Johnson, Alex Jones, Ali S. Khan, J. Gordon Melton, Erich 'Mancow' Muller, Sean Murphy, Isabel Pauley, Mark Potok, Michael Rivero