Thirty years ago, life in the suburbs still meant tranquility, a slower pace, and insulation from the problems of big cities. Today, those suburbs are among the fastest-growing cities in America. What is fueling the growth and what are the implications for our country? We’ll spend this hour with Robert E. Lang, Director of the Metropolitan Institute at Virginia Tech in Alexandria, Virginia and co-author of “Boomburbs: The Rise of America’s Accidental Cities” (Brookings, 2007).