It’s been 56 years since the Greenwich Village townhouse exploded. Three people died. The rest vanished. The only one left alive to tell the story is Cathy Wilkerson, now 81—still wrestling with what she did, what she believes, and what, if anything, she truly regrets. Episode 6: The Survivor was reported, written, and produced by Chloe Stein and Eleanor Barzun.

Shoe Leather is an investigative podcast that goes behind the scenes of forgotten stories that shaped New York City. Go along with the team as they knock on doors and track down the people who were at the center of the news.

This season, we're going to 1970 Greenwich Village. A townhouse suddenly explodes. And authorities find out that it’s ground zero for the operations of the Weather Underground: a radical group of young revolutionaries who use violence to "bring the war home." Three members are killed in the explosion, two others escape. Police would later describe the townhouse as a “bomb factory.” What pushes a protest movement toward violence? What makes a group of mostly middle-class, college-educated young men and women decide to build a bomb?