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

Aired: 8/24/2015 | 0:08:35 | Clip
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.

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