Cities across this country and around the world have been taking baby steps lately toward dropping their dependence on the car. There are investments in public transit here, new bike lanes there, and a few streets given over to pedestrians, even for one day a month. But what about a modern, urban city completely free of cars? Author J.H. Crawford argued on today's show that it could be a reality. What do you think -- is it feasible? Do you want your city to go car free if so?