From the CNN transcript:
"(BEGIN VIDEOTAPE)
S. O'BRIEN: There are people who say your evacuation plan, obviously in hindsight, was disastrous.
MAYOR RAY NAGIN, NEW ORLEANS: Which one?
S. O'BRIEN: Your evacuation plan before -- when you put people into the Superdome. It wasn't thought out. You got 20,000 people in there. And that you bear the brunt of the blame for some of this, a large chunk of it.
NAGIN: Look, I'll take whatever responsibility that I have to take. But let me ask you this question: When you have a city of 500,000 people, and you have a category 5 storm bearing down on you, and you have the best you've ever done is evacuate 60 percent of the people out of the city, and you have never issued a mandatory evacuation in the city's history, a city that is a couple of hundred years old, I did that. I elevated the level of distress to the citizens.
And I don't know what else I could do, other than to tell them that it's a mandatory evacuation. And if they stayed, make sure you have a frigging ax in your home, where you can bust out the roof just in case the water starts flowing.
And as a last resort, once this thing is above a category 3, there are no buildings in this city to withstand a category 3, a category 4 or a category 5 storm, other than the Superdome. That's where we sent people as a shelter of last resort. When that filled up, we sent them to the Convention Center. Now, you tell me what else we could have done."
-----
Last year there was an eight day exercise involving FEMA, the State of Louisiana, the City of New Orleans, and others, addressing a scenario almost identical to Hurricane Katrina. On the first day only one representative from the City of New Orleans showed up. If the mayor and his buddies had taken things a little more seriously they might have at least had some ideas, if not answers, these 14 months later.
Hurricane Pam exercise