Dr. Mohammed Arif helps treat a wounded patient at a field hospital in Kobani, Syria. Most of the clinics in this besieged Syrian border town are now in ruins. Only one still stands, its location kept secret lest it be targeted. Jake Simkin/AP hide caption

itoggle caption Jake Simkin/AP

Relatives of 43 students who went missing in Iguala, Mexico, search for them on a hill on the outskirts of town on Nov. 29. After the students vanished, searches around Iguala have turned up nearly a dozen clandestine graves. None of the remains found in those mounds belonged to the students. Eduardo Verdugo/AP hide caption

itoggle caption Eduardo Verdugo/AP

A man gets information about how to buy dollars at a foreign exchange business in Buenos Aires, Argentina, on Jan. 27. Natacha Pisarenko/AP hide caption

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Anti-government protesters carry the body of a demonstrator who was shot to death during clashes with the National Police in Port-au-Prince, Haiti, on Saturday. Prime Minister Laurent Lamothe says he will step down in response to protesters' demands. Dieu Nalio Chery/AP hide caption

itoggle caption Dieu Nalio Chery/AP

Flowers, candles and handwritten messages remembering the 43 missing students line the fence at the National Palace in Zocalo, Mexico City. Geovien So/Barcroft Media/Landov hide caption

itoggle caption Geovien So/Barcroft Media/Landov

Maria Isabel de la Paz, a U.S. citizen, was twice turned away when trying to enter the U.S. legally. When she attempted an illegal crossing, her case was decided by a Border Patrol agent, not an immigration judge. John Burnett/NPR hide caption

itoggle caption John Burnett/NPR

Greenpeace activists stand next to massive cloth letters next to the hummingbird geoglyph at Peru's sacred Nazca lines. The Peruvian government is pursuing criminal charges against the activists. Rodrigo Abd/AP hide caption

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Natividad de la Cruz Bartolo shows a picture of her son, Emiliano, one of 43 university students who went missing months ago. Carrie Kahn/NPR hide caption

itoggle caption Carrie Kahn/NPR