randy shandobil first brought us this story in 2001. >> america's first incident of mass bio terrorism hit suddenly. 18miles east of portland in the city of dowel. >> i've never been any sicker than that. >> horrible stomach cramps. >> reporter: cramped that sickened 463 people many had to be hospitalized. it was 1984 and the salmonella outbreak sickened many. officials unable to determine the source called investigators from the cdc. the centers from disease control who found a common link. all of the people had eaten at salad bars in 10 local restaurants. >> you know it all but killed the restaurant business here in town. >> reporter: most of those restaurants closed was it wasn't until a year later, investigators found the true source of the outbreak, a few members of a religious cult deliberately poisoned the salad bars. >> they were basically hitting us with a squirt gun of some sort and just spraying it. >> reporter: but why? a couple of years earlier we were there as the rajnisies all wearing the color red started building their own city. the city tried to stop them because the

randy shandobil reported. >> reporter: as we've been seeing kilauea has been erupting.n that's more amazing, a new island is being born. the new island of louigi. >> we're going to be 10,100,000 years since it reaches the surface. >> it will start as a new island and if it starts growing it will join the islands of hawaii. >> reporter: it seems to prove the hot theory. the infamous pacific ring of fire. but the hawaii island all of them volcanos are in the middle of the pacific plate, why? >> the hawaiian islands are situated over what we think is a stationary hot spot in the mantle beneath us here in the middle of the pacific ocean. since the pacific plate is drifting very slowly to the northeast. each volcano in turn is rafted away from the hot spot so it loses its source of magma and the volcanos become extinct. >> reporter: hawaii is -- kauai is the oldest island. hawaii and ilugis the newest. >> reporter: volcano national park is one of the only spots in the world where you can safely watch a volcano. eruptions here are relatively gentle compared to those that expl