New Orleans still learning from Katrina — and the Dutch — on preparing for another flooding disaster

Twenty years ago today, disaster struck New Orleans. Hurricane Katrina arrived. But it wasn't so much the wind that caused destruction, it was when the levees breached, pouring water into the city. Other cities around the globe have suffered from similar circumstances, most notably the Netherlands in 1953 when a high-tide storm breached the dikes, flooding many parts of the country. Dutch engineers have been learning from this disaster ever since. So, in the aftermath of Katrina, experts and engineers in New Orleans looked to the Dutch. One of those experts is David Waggonner, co-founder of the architecture firm Waggonner and Ball. We first spoke to him in 2013, he's back again to speak to Host Marco Werman about the progress made.