Yes, These may be the guys who know what's going on and opened their mouths. Perhaps they where speaking out about foriegners in US labs being involved in getting the military grade anthrax to other foriegn operatives to committ terrorists attcks???
One thing is for sure the government/FBI seems to have no interests in finding out what is happenning to these experts or in letting these aatacks get blamed on foriegners.
The government seeems to only want this blamed on a lone American right-winger
Also, I have to imagine we have many biologists/scientists to call upon from around the world, not that I think there would much time for research and development.