Production of anthrax as a biological weapon does not require special equipment or advanced technology. It is extremely stable and can be stored almost indefinitely as a dry powder. It can be loaded in advance, as a freeze-dried powder, in munitions or disseminated as an aerosol with crude sprayers. While protective clothing and gas masks provide excellent front-line defense, their effective use requires rapid and early detection of the agent. Detection devices are not sufficient to completely protect against the threat.
Anthrax is odorless, tasteless and invisible.
They may not detect an agent in time to warn personnel to don protective gear before exposure would occur. So, in response to your second question, the threat of weaponized anthrax is very real even though it's use was very limited in the past. Our adversaries chose anthrax because of the relative ease of producing and storing of the agent, not to mention the destructive measures it is capable of. We have little doubt our adversaries will use weaponized anthrax if it is to their advantage. You mentioned that you were having trouble locating a web site for your research.