An employee displays a gold bar at a gold refining workshop of the plant of Uralelektromed Joint Stock Company (JSC), the enterprise of Ural Mining and Metallurgical company (UMMC) in the town of Verkhnyaya Pyshma, outside Yekaterinburg, Oct. 17. Maxim Shemetov/Reuters/Landov hide caption

itoggle caption Maxim Shemetov/Reuters/Landov

A sculpture of oil workers in Caracas, Venezuela. The country is heavily dependent on oil exports, and falling oil prices have had a ripple effect on the country's already troubled economy. Ariana Cubillos/AP hide caption

itoggle caption Ariana Cubillos/AP

U.S. Secretary of State John Kerry speaks with Saudi King Abdullah bin Abdul Aziz al-Saud as the Saudi ambassador to the United States, Adel al-Jubeir, listens before a meeting at the Royal Palace in Jiddah, Saudi Arabia, on Sept. 11. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images

Liberian President Ellen Johnson Sirleaf visited West Point in August, when the impoverished neighborhood was quarantined to prevent the spread of Ebola. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR