previously everyone within 20 kilometers was told to leave. now people up to 30 kilometers are not being told to leave, but are being advised to. this is worth understanding. i desperately want to understand its importance. i am grateful to have frank von hippel with us. cofounder of the program on science from princeton. co-chair of international panel on materials. he wrote an article on fukushima and the future of nuclear power in the united states titled it can happen here. professor, thanks for being with us again. my pleasure. let me start as is my custom if i got anything wrong in the introduction. no, that was good. that s the first i heard about the crack. that could explain a lot. i was looking at the reports from the nuclear industrial