Are New Orleans’ post-Katrina flood defenses strong enough?

Are New Orleans’ post-Katrina flood defenses strong enough? More

Ten years ago, the levees and flood walls meant to protect New Orleans failed against the force of Hurricane Katrina. Since the catastrophe, roughly $14 billion have been spent to upgrade the city's storm defenses. But is that sufficient? William Brangham reports.

AIR DATE 8/24/15