Forbes put Detroit Mayor Dave Bing on its cover in 2011 for a story with the optimistic headline: “City of Hope.” The premise was that the city had hit rock bottom and was poised for a turnaround. “Right now, it’s all about survival,” Bing told Forbes. Two years later, Detroit’s problems continue to multiply, sadly. It is still dealing with high levels of violent crime and unemployment. Home prices, already at historic lows, plummeted a further 35% during the past three years to a median of $40,000 as net migration out of the city continued. The latest blow was Tuesday’s...