Becoming PhiladelphiaOnce dismissed as a rusting industrial has beenthe Next DetroitPhiladelphia has enjoyed an astonishing comeback in the 21st century. Over the past two decades, Inga Saffron has served as the premier chronicler of the citys physical transformation as it emerged from a half century of decline. Through her Pulitzer Prize winning columns on architecture and urbanism in the Philadelphia Inquirer, she has tracked the citys revival on a weekly basis.