Roaches, rats, bed-bugs, and other people-loving pests have been with us for centuries. And despite our best efforts, they persist. That’s particularly true in cities, especially in neighborhoods with a history of disinvestment. Pests are living symbols of our long battle with inequality. We hear from UMBC professor Dawn Biehler, author of "Pests in the City: Flies, Bedbugs, Cockroaches, and Rats".