Storms of the Century

Since the turn of the millennium, we're seeing deadly and destructive hurricanes slam into the U-S, leaving an unimaginable toll. "Once-in-a-century" storms are now becoming recurring events. Over the next 30 minutes, we are looking back at some of the worst hurricanes starting with a storm that changed New Orleans, and the country, forever - Hurricane Katrina. Hosted by Al Roker.