Rachel Maddow Presents Ultra

A devastating explosion rips through a munitions plant in a small New Jersey town. And the American public is left with the chilling fact that the federal government had been warned about such an attack almost a year prior. The tip had come from a private spy ring operating in Los Angeles that was intent on doing what law enforcement had largely failed to do. Infiltrate far-right groups plotting violence across the country, and foil their plots before it was too late.