I don't believe they did, but then, her FAS "report" is a pedantic piece of work that is hard to get that much out of. What she does is tailor her story to her audience of the moment. When she spoke to foreign journalists, they would help her out, by claiming to have their own FBI sources, supporting her wild CIA scientist-assassin story.
nonetheless, evidence does seem to point to homegrown anthrax ... or a homegrown "distributor" ... it would seem Saddam would have picked different targets rather than Brokaw and Daschle, et al ... though I must admit the first time I heard "anthrax" I susupected Saddam (cf: HBO's "The Doomsday Gun") ...
If you have evidence supporting the "home-grown" assassin theory, I'd love to see it. I've heard many a CLAIM that such evidence exists, but I've never seen anyone come up with any. Meanwhile, mucho evidencia points to foreign terrorists.