Tom Piazza is the New Orleans-based author of City of Refuge and a writer for the upcoming HBO series Treme. His book Why New Orleans Matters, written immediately after Hurricane Katrina, received the 2006 Humanities Book of the Year Award from the Louisiana Endowment for the Humanities. Here Mr. Piazza speaks from about the importance of Charity Hospital from the porch of a Lower Mid-City home. "Charity is a central part of the community," he says. "New Orleans seems to be based, in large measure, on a respect for and an understanding of the past. If you lose that, you lose a lot of what makes the city what it is." See the full video here.