What the Doomsday Cults of the '70s Can Teach Us About Radicalization

Tracy Parks, 12, of Ukiah, Calif., looks at a photographer as her father, Gerald, rests in a Georgetown, Guyana hotel, Nov. 24, 1978. Tracy and her family were part of Rev. Jim Jones' cult.
( Ken Hawkins / Associated Press )
Produced by Isabel Angell
Hosted by Todd Zwillich