Well, the government also put in an order for 100 million doses of Cipro after the anthrax attacks of last year, so that's in the stockpile already (U.S. buying 100 million doses of anthrax antibiotic). The problem is that it is generally very easy to add antibiotic resistance to bacteria -- it doesn't require sophisticated genetic engineering, just routine lab techniques -- so it's all too possible that they only used antibiotic-susceptible anthrax for the warning letters for operational reasons, i.e. to protect the senders from accidental death and subsequent exposure. I bought 60-day supplies of Doxy and Cipro after the anthrax scare, but I honestly don't have that much faith they would be much help in a real attack. The anthrax vaccine has a completely differnt mode of action and probably would save a lot of lives -- if we can put in place the infrastructure to deliver it to millions of people in a very short space of time and if we can figure out how to avoid complet, Panic in the Streets-style social disintegration when the news hits of the first few hundred people checking into St. Vincent's with respiratory problems. Those are big ifs, IMO.