>> barbara starr at the pentagon. >> and of course, we were discussing with barbara, the u.s. military's involvement and the fears of the nuclear power plant, and we are joined by jim walsh who is from newton, massachusetts, and he is a nuclear expert from m.i.t., and what is your fear if you have a fear right now do you have after hearing of this cooling tower issue in one of the plants, after hearing of a fire being put out, but a fire nonetheless in another plant. what are your fears? >> yeah, oh, i have two things that i am concerned about, but before i say that, let me extend my deepest sympathies to the people of japan. you have picked up international viewer ins the last half hour, so i can't tell them how sorry, i am about this. in terms of what is happening on the ground, it is thele cooing system that matters most. the fire is sort of incidental. this is how it works. even when the warning first came that there was an earthquake, all of the plants shutdown, and 111 of the pla 1