For four decades, through the depths of the Cold War and the collapse of the Soviet Union, Europe has relied on Russian gas to keep its economy moving, sending hundreds of billions of dollars to Moscow in return.
Bloomberg: EU fires Gazprom warning shot as Putin moves to tighten gas grip
Alexey Miller, CEO of Russian gas giant Gazprom, smiles during a conference organized by the Valdai International Discussion Club in Berlin, Germany, on April 13, 2015.
