It is rude to answer a question with a question :)

However, lets assume there is some group hidden in Atlanta that are behind this Anthrax attack. Arrest them and put them on trial, with any luck, execute them. Now, as to your rather outrageous idea of bombing thier neighborhood. Not literally, I don't think so. But lets bring it into light of what is going on. If Atlanta officials said that the Federal Government had no right to arrest these people, and threatened the feds if they tried to arrest them. I think it is safe to assume we would give every chance for the culprits to be turned over, then we would move in whatever force was needed to capture them. There are many differences however. The people of Atlanta elected thier leaders, it is not a military power, there are others, but I think you can tell that such a comparison is not very effective.