Igor Sechin, chief executive officer of OAO Rosneft, speaks during a plenary session of the 21st World Petroleum Congress in Moscow, Russia, on Monday, June 16, 2014. Work between Texas-based Exxon, the world's largest oil company by market value, and state-run Rosneft on Sakhalin Island in Russia's Far East provides a template for further exploration, especially in the Arctic's Kara Sea, Exxon Mobil Corp. Chief Executive Officer Rex Tillerson said at the World Petroleum Congress in Moscow today. Photographer: Andrey Rudakov/Bloomberg via Getty Images
