Russia 's Gazprom one of world 's most powerful energy companies . Gazprom controls 20 % of world 's natural gas reserves . Russian government owns controlling stake ; Company lost $ 61B last year . Russia has used Gazprom to exert control over former Soviet states .
Russia 's Gazprom one of world 's most powerful energy companies . Gazprom controls 20 percent of world 's natural gas reserves . Russian government owns controlling stake ; Company made $ 61B last year . Kremlin has used Gazprom to exert influence over former Soviet states .