One of the most amazing sights was flying out of England to the north of Russia to have a look at things up there. If you did that, it was a pretty long run. We'd refuel twice just to get up there. You would get a couple of sunsets and sunrises, because at those northern latitudes often you would see day to night, and then a terminator line, almost like a black velvet curtain where you can see how it's light on this side, and dark on the other side. It's the most amazing thing you can imagine to see that.