Tankers are berthed beside the Fawley oil refinery on Jan. 7, in Southampton, England. With low oil prices, some traders are buying oil and storing it in tankers, hoping the price will rise soon so they can sell it at a profit. Matt Cardy/Getty Images hide caption

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Coleen Schaefer (left) and Doni Sprague display a tiger pelt that was confiscated and is being stored at the National Wildlife Property Repository on the outskirts of Denver. Some 1.5 million items are being held at the facility. The Trans-Pacific Partnership, which is still under negotiation, would punish wildlife trafficking. Jackie Northam/NPR hide caption

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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

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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

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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

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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