I agree with your opinion, but tend to put more weight in the idea of this coming from the US government. If not, it certainly didn't get a fair investigation. This wasn't coincidental, and the ensuing cover up (or botched investigation) suggests that it came from or was supported by the government.
As I noted with the handwriting, we need to consider the possibility that the last attack, which was postmarked three weeks later, came from a different source. If you enlarge the images of the letters, you'll see what I am saying about the letter carefully copying the handwriting. As for the strains of anthrax, I think there was some confusion in the media between all three (thanks for the correction) strains. At least two were not of that military grade we mentioned and I believe this is the reason that the entire attacks were not considered "military." The last substance was clearly white, suggesting that it was the more sophisticated aluminum based type I mentioned. For the genetics, I reference this article:
On 9 May 2002, New Scientist published an article that reported:
'The DNA sequence of the anthrax sent through the US mail in 2001 has been revealed and confirms suspicions that the bacteria originally came from a US military laboratory. The data released uses codenames for the reference strains against which the attack strain was compared. The two reference strains that appear identical to the attack strain most likely originated at the US Army Medical Research Institute for Infectious Diseases at Fort Detrick (USAMRIID), Maryland.
The new work also shows that substantial genetic differences can emerge in two samples of an anthrax culture separated for only three years. This means the attacker's anthrax was not separated from its ancestors at USAMRIID for many generations.'
http://www.newscientist.com/article.ns?id=dn2265Thanks for responding and correcting my post. I am relatively new to researching this matter, but I think it is one of the most important matters to investigate, and we must consider it when looking into the possibility of losing our government. There are lots of bunk theories about 9/11 being an inside job and what not, but I think this is legitimate evidence of something mischievous originating from either within our government itself, or from someone loyal to it. I do think that whomever did it, wasn't exactly taking orders from the chain of command. It has probably more in common with the scenario behind the leaking of Valerie Plame.