Near the beginning of the article, it states that the Japan tsunami was "unexpectedly high." this is false. Upon closer review of the historiical data, it was identified that the Japanese inappropriately dismissed some of the large tsunamis from the historical data. This led the Japanese to underestimate the probability of a large tsunami and not design enough protection into the nuclear plant. When all the historical data is included, a tsunami of the size that hit Fukushima is not only probable, but expected to occur over the lifetime of the nuclear plants. If anything, Fukushima proves that the methods of calculating hazards are correct - provided you don't fudge the data. Fortunately for those in the US, nuclear plants are strongly regulated and this type of error would have been identified a long time ago.