the cdc. the way they arrived at that 75 number was not just the people working in this lower biosafety lab but also people who walked through the hallways around that biosafety lab. admittedly, having covered stories like this before, it's not an exact science. could somebody have walked through at some point, it's a possibility. but 75 is sort of the number they're saying right now. they're offering those people antibiotics, most of them i assume will take those for 60 days. some of the officials a they maybe offered the anthrax vaccine, as well if they didn't already have one. >> jim shut toe, let's talk about some people might wonder why is anthrax sitting around? why did they have it 1234. >> the reason they have it is to develop defenses against it. anthrax is considered the number one or number twos bioterror threat from the rogue states, rogue organizations, terrorist organizations or other states. for instance, russia has been accused of continuing to have a