long it will take, of course, to get more water in the core. the key thing is to get water in the core. as matt points out, at the moment they're limited in their ability to do that because of the loss of the diesel generators. >> matthew, let me come back to you. if the doomsday scenario does occur and we see a meltdown with radiation, what will that do to the environment in japan and what does it mean for nuclear plants in america, for example, if a similar thing was to happen here? >> there's the beginnings of nuclear renaissance in construction all over asia and to comex tent in the united states. if there's a major incident that is not good for the nuclear construction business, the plants that are running in this country will probably continue to run without difficulty. i don't know what effect it will have.