the problem with the anthrax was that it was so highly weaponized and so specialized that it could easily be traced back to a United States facility.
And the problem with this nanothermite that was found in the WTC dust is that it was so specialized that it can be traced back to the United States Army.
Well, we already have an anthrax--New York--WTC--Giuliani--Army nexus, don't we?
...Army Secretary Thomas E. White. He's a good starting point for your nanothermite investigations.
What lab did that nanothermite come from?
Find it.