On March 6th, 1970, a bomb went off in the basement of a four-story townhouse in Greenwich Village, New York. As the smoke cleared, it became clear that this wasn't a gas leak. And it wasn't even an intentional act of terror. It was an accidental one caused by the left-wing anti-war group: The Weathermen. To listen to all four episodes of 'The Weather Underground" right now and ad-free, go to IntoHistory.com. Subscribers enjoy uninterrupted listening, early releases, bonus content and more, only available at IntoHistory.com. We want to hear from you! Visit americancriminal.com/survey Your feedback will directly help improve the show. Learn more about your ad choices. Visit megaphone.fm/adchoices