The Columbia Tap Trail, a historic train line in Houston, is a four-mile path where residents have practiced tactical urbanism for decades. Now, with new support from the city and funders, the trail is becoming more of a community resource for the thousands who live nearby. Edward D. Pettitt, doctoral candidate the Bullard Center for Environmental and Climate Justice, joins us to discuss his work with the Friends of Columbia Tap, a group of residents working to bring this new vision to life.