like i am, you get green tea from japan, you shouldn't worry about that? >> i won't make scientific judgments. i think they made it clear that they have been able to handle much of the radiation because we stayed within the vessels. that's one of the reasons i'm concerned about unit four. ha is outside the containment process and that why it's earthquake or tsunami can be so serious. i was visiting and we were getting on the bus to go to the airport. people said oh, pretty amazing that you didn't have an earthquake or tremor while you were there. this happens frequently there. >> just back from japan and fukushima, thank you very much for your insight. >> thanks for having me. >> a bit of american history took a final flight this morning. nasa's oldest and most traveled space shuttle discovery left