Iconoclast, your link did not work for me, so I will address only what I read in your comment.

We all have had to speculate about the explanation for this anthrax attack, but your speculations have gone far away into associations involving the ownership of the AMI building. At some point you should recognize that you are wandering around too far away in your speculations about associations and that you should re-ground yourself on the available evidence about the basic known actors and events.

It’s reasonable for you to suppose that one anthrax letter might have been sent to the AMI building for some reason that involves the building’s ownership. It is reasonable also for other people to dismiss your own supposition as far-fetched. For those other people, all your information about the further associations of the building’s owners to other people and organizations is doubly and triply far-fetched. Practically nobody is following your train of thought.

I hope you have read or will read one of the links above,

http://www.anthraxinvestigation.com/Florida.html

which was provided in a previous comment by What is ‘Occupation’. The explanation in that link is a much simpler and more reasonable and compelling explanation of why one letter was delivered to that particular address in Florida.