The photographs in Richard Misrach's Destroy This Memory are a stark, affecting reminder of the physical and psychological impact of Hurricane Katrina as told by those on the ground, and seen through the lens of a contemporary master. Rather than simply surveying the damage, Misrach--who has photographed the region regularly since the 1970s, most notably for his ongoing Cancer Alley project--found himself drawn to the hurricane-inspired graffiti: messages scrawled in spray paint, crayons, chalk or whatever materials residents and rescue workers happened to have on hand. At turns...