By | October 05 2012 4:35 PM

In the weeks after Hurricane Katrina walloped New Orleans, residents of the Lower 9th Ward began to notice a new crop of people wandering through their debris-strewn streets. They weren’t relief workers or returning residents. They weren’t even journalists. These strangers coming in by the bus-full, it turns out, were paying tourists exploring the neighborhood on a so-called Katrina tour.