On the seventh day..
It's my engineering education. As I study management and organizations as a profession, there remains a desire to get to the empirical realities first -- what can we know objectively as fact? However, socially speaking, getting to the facts has many filters and complications. And when facts are uncovered, there are more issues: Who will organize them and in what way? Who will get to see them? To what extent should the facts be summarized or deliver raw? Unfortunately, quite a bit works again the public learning (and remembering) what the facts are.
When public reactions to facts quickly become partisan bickering, it's a waste. Fortunately from what I've seen, the people who were most disrupted by Katrina aren't so easily distracted into the partisan exchanges. Usually I find them looking instead for trusted and credible information, so that they can make household decisions.