Former Chief Urban Designer of The City of New York Alexandros Washburn joins WIRED to answer the internet's burning questions about city planning. How does the New York City Subway compare to others worldwide? What are the pros and cons of rent control initiatives? Which city can lay claim to being "smartest" in the world? Or has the best airport? What challenges will the urban designers of tomorrow need to meet? Alexandros Washburn answers these questions and many more on City Planning Support.