ExxonMobil chief executive Rex Tillerson (left) and Russian President Vladimir Putin (right) attend a signing ceremony in Tuapse, Russia, in June 2012 for an agreement between Rosneft and ExxonMobil to jointly develop reserves in western Siberia. Photo: EPA/Mikhail Klimentyev/RIA Novosti
ExxonMobil chief executive Rex Tillerson (left) and Russian President Vladimir Putin (right) attend a signing ceremony in Tuapse, Russia, in June 2012 for an agreement between Rosneft and ExxonMobil to jointly develop reserves in western Siberia. Photo: EPA/Mikhail Klimentyev/RIA Novosti