This might have been just a coincidence, but on the weekend prior to the eleventh, the Fairfax County Rescue squad stage an excercise that was a mock response to a chemical/biological attack. It is possible that they do these things all the time but I found the timing to be very interesting. Of couse it could just be very fortunate timing on their part that made them more prepared for what lay in the near future.
Yes, it could be just a coincidence. But, then, for a country such as ours, which has the FBI, CIA, the alphabet media, and a host of other "sources," I would have to say, probably not.