If sales of Russian equipment flagged during 2016, the country is working hard to reverse the trend, trying to heavily market its S-400 air-defense system. Russia is very close to closing a deal with Turkey worth an estimated $2.5 billion for the surface-to-air missile. Turkish President Tayyip Erdogan said on Dec. 11 that the purchase could be finalized within a week. The sale is proceeding despite the objections of Turkey’s NATO partners. And the Russian state-owned defense company ...
