A woman in Buenos Aires walks with her dog past a mural that reads "Vultures" in Spanish. The mural is a reference to the dispute between the Argentine government and U.S. hedge funds. Victor R. Caivano/AP hide caption

itoggle caption Victor R. Caivano/AP

An oil refining factory owned by the Russian company Rosneft, outside the town of Achinsk, Russia, in 2013. The company says that hundreds of sites are being explored throughout the country as potential sources of oil and gas — but to tap those sites, Russia depends on Western companies. Ilya Naymushin/Reuters/Landov hide caption

itoggle caption Ilya Naymushin/Reuters/Landov