Some people questions whether or not Phoenix should even exist, but could their doubt actually be good for the city? At a Zócalo/ASU College of Public Service & Community Solutions event, Arizona Republic columnist Robert Robb moderated a discussion between three panelists -- former Phoenix Mayor and Arizona Attorney General Terry Goddard, New York University historian Andrew Needham, and Sarah Porter, director of ASU’s Kyl Center for Water Policy at Morrison Institute -- on Phoenix's resources, history, and future.