if instead of a surge of water from the sea crippling a city and surrounding areas, it was a dirty bomb that took out the heart of some city and surrounding areas were uninhabitable due to radiation?

I hope the right people are analyzing the situation with this in mind. So far, hundreds or thousands of people are working around the clock to take care of situation but if you read between the lines, communication and proper coordination of services are in a mess.

What is the department of Homeland Security's job again?
What is FEMA role?

This Katrina disaster should be a map for the future cause terrorists are surely planning something bigger than 9/11.

Am I wrong?