In Daschle's office, the woman spotted the brown powder as soon as she opened the envelope that it occurred. She did not remove the letter, she placed it down, called security right away. 29 people were exposed. Notice the difference? Those were busy offices too. The stuff Daschle got was ground extremely fine professionally no matter what the spin masters are trying to tell us.
We dont know if all those 29 people got the exposure from that one envelope, I suspect there may be more going on here.