When it comes to large-scale public housing in the United States, the consensus for the past decades has been to let the wrecking balls fly. The demolition of infamous projects, such as Pruitt-Igoe in St. Louis and the towers of Cabrini-Green in Chicago, represents to most Americans the fate of all public housing. Yet one notable exception to this national tragedy remains. The New York City Housing Authority, America's largest public housing manager,...