20 years later, a look at the legacy of Hurricane Katrina

To discuss how the Gulf Coast has changed in the two decades since Hurricane Katrina, Geoff Bennett spoke with historian Douglas Brinkley. He was a professor at Tulane University in New Orleans in 2005 when Katrina hit, and is the author of "The Great Deluge: Hurricane Katrina, New Orleans and the Mississippi Gulf Coast." He's now a professor at Rice University in Houston.