When Vladimir Putin visits Istanbul on January 8, the Russian president will be doing more than officially opening a new export pipeline -- he will be getting some more closure on his longstanding dream to end Moscow's dependence on archrival Ukraine in getting natural gas to Europe. Russia has been seeking to cut gas transit through Ukraine since the mid 2000s, and the $7.8 billion TurkStream pipeline project is a big part of that strategic goal. The pipeline, which transits the Black Sea and surfaces outside Istanbul, took five years to complete and is one of two major new natural-gas...