An employee stands near pipes made for the South Stream pipeline at the OMK metal works in Vyksa in the Nizhny Novgorod region April 15, 2014. REUTERS/Sergei Karpukhin As the crisis over Turkey’s downing of a Russian Su-24 jet drags on, the Kremlin continues to threaten Turkey. President Vladimir Putin promised “significant consequences,” while Putin’s spokesman warned that the Russian president w