Bingo! There are now 2 and perhaps 3 cases in less than a week. Going beyond 'normal' occurances. These guys are cunning. Had they used a crop duster and there been mass exposure and mass deaths by a WMD, I doubt any nation would have batted an eye if we sent them a nuke. But, by exposing a few people and hoping it spreads in a more slow manner, they will have left enough doubt that some nations may balk at any nuke attempt.
Just as there is a tremendous trail that eventually leads back to bin Laden for the WTC attacks, so too will the anthrax. Making it hard to say bin Laden did it for sure, no fingerprints again, so to speak. And just enough uncertainty for Islamic nations to say 'prove it', once again.
Ahem... may I point out that, if I read this article correctly, there are perhaps four cases... note mention of another possible down in Florida...