George Friedman writes: Last week I flew into Moscow, arriving at 4:30 p.m. on Dec. 8. It gets dark in Moscow around that time, and the sun doesn’t rise until about 10 a.m. at this time of the year — the so-called Black Days versus White Nights. For anyone used to life closer to the equator, this is unsettling. It is the first sign that you are not only in a foreign country, which I am used to, but also in a foreign environment. Yet as we drove toward downtown Moscow, well over an hour away, the traffic, the road work, were all commonplace. Moscow has three airports, and we flew into the farthest one from downtown, Domodedovo — the primary international airport. There is endless renovation going on in Moscow, and while it holds up traffic, it indicates that prosperity continues, at least in the capital.