VIDEO: Jeff Speck: The walkable city

How do we solve the problem of the suburbs? Urbanist Jeff Speck shows how we can free ourselves from dependence on the car -- which he calls "a gas-belching, time-wasting, life-threatening prosthetic device" -- by making our cities more walkable and more pleasant for more people.

Jeff Speck is a city planner and the author of "Walkable City."