Foreign relations of Kazakhstan are primarily based on economic and political security. The Nazarbayev administration has tried to balance relations with Russia and the United States by sending petroleum and natural gas to its northern neighbor at artificially low prices while assisting the U.S. in the War on Terror. Kazakhstan is a member of the United Nations, Organization for Security and Co-operation in Europe (which it chaired in 2010), North Atlantic Cooperation Council, Commonwealth of Independent States, the Shanghai Cooperation Organisation, and NATO's Partnership for Peace program. Kazakhstan established a customs union with Russia and Belarus, transformed into the Eurasian Economical Community then in 2015 into the Eurasian Economic Union. President Nazarbayev has prioritized economic diplomacy into Kazakhstan's foreign policy.