According to an article by Yossi Melman, the US spent $200 million dollars for Israel to develop and produce an anthrax vaccine, and test it on Israeli soldiers during the 1990s.
When the US military was testing plenty of other experimental vaccines on American soldiers during the 1990s (I know of at least half a dozen) what might have led them to test this one offshore? What did the military know about the anthrax vaccine? And when did they know it?
It seems they knew it before the mass mandatory inoculation program began in 1998, but went ahead anyway. That program was initially slated to vaccinate every soldier, but after many vaccine refusals and production problems, vaccinations were limited to those soldiers deploying to Asia.
This story is getting a lot more interesting...