In the event of a deliberate nuclear event, what makes anyone think that FEMA will be operable? It's headquartered in Washington D.C., one of the most likely targets. Are the local ones in any position to take over, or are they also in a place that would be a likely target?

The trouble with government agencies is that they make plans for the best-case scenarios, not the worst-case scenarios. They do what is easiest and what is most politically expedient.

Sue