Russian President Dmitry Medvedev visited energy-rich Turkmenistan on Sunday, easing tensions over a gas dispute that saw the isolated country reach out to the West. Medvedev and his Turkmen counterpart Gurganbuly Berdymukhamedov clinked champagne glasses for the cameras in the Caspian Sea port of Turkmenbashi, after a bitter row that crippled Turkmen gas exports in recent months.