plutonium, told me it's toxic and poisonous. >> what's the extra ris about plonium? >> especially acvee. chemically and it's especially radioactiv so, this contamination, this radioactive -- these radioactive particles suspended and carried and ssolved in the water could end up who knows where. they could end up in the water in tokyo it could end up on farm fields. it could end up spreading all over the area where workers are trying to cool this thing off. >> so, is there any turning back here? i mean, can they go about in any way repairing this cracked containment vessel which houses the core? >> boy, i'm open-minded, of course, but i don't think you can repair a cracked vessel. instead you have to cemmaybt it. maybe that is a repair. tyou have to seal it off in air reversible way. you have to plug it up with