steve monroe runs the division of high consequence pathogens. is it possible the small pox can still grow? >> it's possible, but we do not know for sure if the small pox virus in these samples will still be able to grow in the laboratory. >> reporter: what is your guess? >> i would not be surprised if one or more of these samples contains live, growing small pox virus. >> reporter: but then you're going to destroy it and it will be gone forever? >> we will destroy it and it will be gone forever. >> reporter: it was july 1st when a lab worker at the national institutes of health found the small pox vials while cleaning out a storage refrigerator. the vials appeared to date back to the 1950s. from that moment, the c.d.c., n.i.h., f.b.i., f.d.a. and world health organization worked closely to develop a plan of action. the white house was immediately informed that a potential agent of bioterrorism had been found. what was the security involved in moving the samples from bethesda, maryland, to the c.d.c.? >> the security involved the cooperation of t