support their breathing for them. if it was inhaled or injected, both of which can be deadly, you would -- there's been talk of an anti-dote. but there is no available one now. >> if these letters do have ricin, could the ricin have spread to other pieces of mail they just came in contact with for the regular sorting process? >> it could. and we talked about this with regard to anthrax so many years ago, this is different again, because in order for it to spread, the same sort of thing would apply here, you would have to be pretty sophisticated in terms of how it was weaponized. you go from envelope to envelope and be poisoning other people. it can happen, but again, based on what deb is describing, the oily substance as opposed to very small, granular spore type