>> this must be an obvious question, and i don't think there is an answer, but i'll try with you, alex, you're on site. did they ever think of tsunami, earthquake, and the dangers of nuclear energy all at once? >> reporter: i think they probably did, and i know, for a fact, that the kind of building, the kind of design which goes into their pwrs, their pressurized water reactors, which absolutely fringe on the island, it's the main source of power for the country, it's their engine house, yes, they did. and yes, they engineered these things into the situation. but it's fair to say that they are now looking at that very carefully in the future, looking at redesigning. vladimir putin has ordered a redesign of russian nuclear installations on the pacific seaboard as a matter of urgency. the size of this earthquake, it went on for more than a minute. it was well over 8 on the scale of magnitude. it was relatively close to the shore. the length of it, the profundity of it and the resulting tsunamis