The United States is a slow moving giant, that can do anything, or crush anybody. But not quickly.
We put a man on the moon, we overcame the awesome powers of Germany, Italy, and Japan combined, we ousted Hussein. But not quickly. It took time.
We will relocate a whole cityful of people, house, and reestablish their way of life. But not overnight. Overnight we cannot even rescue them from the Superdome.
Maybe it is a good thing that we do not fly off in all directions when something bad happens. After 9/11 we wanted to bomb SOMEBODY. Anybody would do. But big slow, moving Uncle Sam took his time, and then we annihilated Afghanistan.
But it would be helpful if we could move faster to help people with immediate needs. Katrina is not the last disaster we will experience. I am sure we will develop a disaster response plan. But it will take time.