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Russia and Ukraine have reached a deal over the price of natural gas, ending a pricing dispute that's been swirling since January 1. Ukraine admitted to siphoning off some gas from the pipeline that runs through its borders, and Russia agreed to work with a Ukrainian government with closer ties to the west. But at its base, the deal settles most of the concerns over possible disruption of gas supplies across the EU. From the European Desk in London, Stephen Beard reports.