Among Florida cities, Sanford has a remarkable amount of green space. As WMFE reporter Matthew Peddie noted for WNYC’s Transportation Nation blog, Sanford has spent more than $20 million in the last two decades creating more than 30 parks and green spaces. However, Sanford is also notable for being home to numerous gated communities – like The Retreat at Twin Lakes, the neighborhood where 17-year-old Trayvon Martin was shot and killed as he walked back from 7-Eleven. One of the questions that Trayvon’s death has raised is the issue of who or what makes a community or a neighborhood seem “safe” or “unsafe.” Elijah Anderson, professor of sociology at Yale and the author of “The Cosmopolitan Canopy: Race and Civility in Everyday Life” writes about the kind of spaces where civil, harmonious interactions between people can emerge. Galina Tachieva, an expert in sustainable planning and community development, is the author of the “Sprawl Repair Manual.”