A semi-truck, or even an SUV both would be able to carry myuch more of that bad stuff, and to disperse it equally well -- or better. Get some common sense.
The trucks did not spread the material, or if they did, the local airflow around the trucks was insufficient to provide a satisfactory aerosol effect.
A light plane could readily cover a vast area with Anthrax spores due to it's speed and altitude.
I don't understand why you are so impatient to "disprove" the idea that Anthrax can be spread in an aerosol form.
BUT, AFAIK, if a semi-truck or SUV (or any other vehicle for that matter) where to enter a "No Drive Zone", he reaction would have been just as severe - especially, if the driver were to ignore repeated attempts to "wave him off" (analog to radio contact).
remember, the Pilot KNOWINGLY flew into denied air space, exhibited suspicious behavior (no transponder - no acknowledgement per radio), and, if the initial accounts can be believed, even flew "erratically" once intercepted.
'm all for common sense in these matters, but even hindsight requires the use of it, otherwise we learn nothing except to ignore such incidents in the future. Once THAT happens, be prepared for the next attack.
Finally a voice of reason. Thanks
"A semi-truck, or even an SUV both would be able to carry myuch more of that bad stuff, and to disperse it equally well -- or better. Get some common sense."
Well, you couldn't be more wrong. A ground vehicle would disperse either an explosion or chemical agents far worse than an aircraft, regardless of scale. The one's lacking common sense on this thread are you and anyone who agrees with you. I am definitely glad you are not in charge of my security.