down from there. >> reporter: one thing the chief told us is that what they continue on a lot in these situations, not only for the canine teams that are just over there, they're swarming around here also. the dog teams are impressive. they can find people alive in the rubble but also count on friends, relatives kind of waving at them, pointing to people, you know who may be inside these structures, my be under the rubble piles, but chief shoft told me something daunting, he said in a situation like this, there may have been whole families gone missing so no one may be looking for them. brian todd is embedded with the rescue team. i want to talk about the plant, the nuclear plant this is a big issue. chad has been following this for us. all around the world people are curious as to how these nuclear reactors work. >> there are reactors literally everywhere. one pound of fuel in a nuclear submarine or an aircraft carrier, it is equal to about 1 million gallons of gasoline. >> this is why it's so popular.