BBC: European countries are trying to break away from their dependence on Russian gas
Each escalation of the crisis in Ukraine sends a jolt of nervousness far beyond its borders as Europe worries about its energy supplies.
With about one-third of Europe's gas coming from Russia and about half of that gas flowing through Ukraine, these are tense times.
Most worried are the four EU member states which get literally all of their gas from Russia - but another 12 rely on Russia for more than half...