The devastation of New Orleans after Hurricane Katrina has been imprinted in our collective visual memory by thousands of images in the media and books of dramatic photographs by Robert Polidori, Larry Towell, Chris Jordan, Debbie Fleming Caffrey, and others. New Orleanians want the world to see and respond to the destruction of their city and the suffering of its people--and yet so many images of so much destruction threaten a visual and emotional...