The strain of anthrax used originally came from the U.S.A., but that was DECADES ago. All this means is that they didn't culture it from their own camel wool, they got it from a lab which got it from a lab which got it from a lab which .... which got it from a lab in the U.S. The word "strain" refers to the biological type of anthrax; different strains can be distinguished by their DNA as well as by their clinical effects.
The physical properties of the anthrax found in Daschle's office apparently point to a process, that was applied to anthrax spores of the abovementioned strain, to make the anthrax spread through the air more easily. At least three countries, the US, USSR, and Iraq, are known to have such a process, but the three countries developed their anthrax-weaponizing processes independently and the engineering details differ.
The latest reports are that further examination of the anthrax powder found in Daschle's office point to the Iraqi version of the weaponizing process rather than the other two known techniques.
I hope this clears things up.