Challenger and Chernobyl, as they happened within a few months.The shape of the Challenger cloud will be forever seered into my brain. And after Chernobyl we had to seek cover immediately when it started to rain and weren’t allowed to play on grass, I’ll always remember that sense of unease. We also had two young kids from the Ukraine in our home for a while. Thinking back on that I feel so bad for them. They were so far from home and communication only worked through a paper dictionary. They didn’t shower for a while because they were told water was very expensive. Somehow their hovercraft was full of eels.