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An energy weapon vs. Russia? /  Michael Levi, Energy, Security and Climate, 5/03/2014http://blogs.cfr.org/levi/2014/03/05/an-energy-weapon-vs-russia/As the standoff between Russia and Ukraine drags on, there are increasing calls to use U.S. oil and gas exports to weaken Vladimir Putin’s hand. There’s something to this, but it’s likely to be a lot less powerful than most pundits seem to think...