A corn purchaser writes on his account in northwest China in 2012. In November 2013, officials began rejecting imports of U.S. corn when they detected traces of a new gene not yet approved in China. Peng Zhaozhi/Xinhua/Landov hide caption

itoggle caption Peng Zhaozhi/Xinhua/Landov

Red Cross volunteers prepare to bury the body of an Ebola victim in Pendembu, Sierra Leone, early this month. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

An Israeli Merkava tank near the Hamas-controlled Gaza Strip border in southern Israel, on Thursday. The Pentagon confirms that Israel tapped a U.S. weapons stockpile for tank rounds. Debbie Hill/UPI/Landov hide caption

itoggle caption Debbie Hill/UPI/Landov

A neighborhood resident walks through a building in Timbuktu, used by al-Qaida-linked jihadi fighters for more than a year. Last year, The Associated Press found al-Qaida documents in the building. Rukmini Callimachi/AP hide caption

itoggle caption Rukmini Callimachi/AP

Passengers packed the waiting hall Tuesday at Hongqiao Railway Station, which services a terminal at Shanghai Hongqiao International Airport. Johannes Eisele/AFP/Getty Images hide caption

itoggle caption Johannes Eisele/AFP/Getty Images