Members of Médecins Sans Frontières (Doctors Without Borders) and SOS Méditerranée distribute food to migrants and refugees aboard the rescue ship Aquarius on May 25, a day after a rescue operation off the Libyan coast. Gabriel Bouys/AFP/Getty Images hide caption

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Gabriel Bouys/AFP/Getty Images

Morning at the MSF hospital compound in Bentiu, South Sudan. The two doctors, Jiske Steensma (left) and Navpreet Sahsi, sit in front of the tents that serve as living quarters for the international workers during their three-to-six-month stints. David Gilkey/NPR hide caption

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David Gilkey/NPR

Five Days And Five Nights With Doctors Without Borders

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A member of Doctors Without Borders looks out over the general hospital in the Central African Republic's capital city, Bangui, in April 2014. Issouf Sanogo/AFP/Getty Images hide caption

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Issouf Sanogo/AFP/Getty Images

Issues on the table at the World Humanitarian Summit range from conflict zones to refugees. Above, a herder moves his goats at the Dadaab refugee camp, created nearly 25 years ago. The Kenyan government now threatens to shut it down. Michelle Shephard/Toronto Star via Getty Images hide caption

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Michelle Shephard/Toronto Star via Getty Images

Injured Doctors Without Borders staff find shelter in a safe room after an airstrike on their hospital in Kunduz, Afghanistan. Anadolu Agency/Getty Images hide caption

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Anadolu Agency/Getty Images

As War Dangers Multiply, Doctors Without Borders Struggles To Adapt

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Army Gen. Joseph Votel, commander of U.S. Central Command, briefs reporters on the release of the investigation into the U.S. airstrikes on the Doctors With Borders trauma center in Kunduz, Afghanistan. Molly Riley/AP hide caption

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Molly Riley/AP

People walk past wooden cabins in France's first international-standard refugee camp on March 8, 2016, in Grande-Synthe, France. Denis Charlet/AFP/Getty Images hide caption

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Denis Charlet/AFP/Getty Images

Defying French Government, Aid Group Builds Refugee Camp

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Members of Doctors Without Borders demonstrated in Geneva, after U.S. forces bombed the organization's hospital in the northern Afghanistan city of Kunduz. Fabrice Coffrini/AFP/Getty Images hide caption

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Fabrice Coffrini/AFP/Getty Images

The charred remains of the Doctors Without Borders hospital is seen on Oct 16, almost two weeks after it was hit by a U.S. airstrike in Kunduz, Afghanistan. Najim Rahim/AP hide caption

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Najim Rahim/AP

After losing most of his family to Ebola, health worker Alexander Kollie (right) is building a new life with son Kollie James, the 1,000th survivor of the disease to be cared for by Doctors Without Borders. Katy Athersuch/Courtesty of Doctors Without Borders hide caption

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Katy Athersuch/Courtesty of Doctors Without Borders

A man sits on a bed that will be part a new Ebola treatment center in Monrovia, run by Doctors Without Borders. David Gilkey/NPR hide caption

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David Gilkey/NPR

Hit Hard By Ebola, Liberia Now Has A Third Treatment Center

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Health workers at the Doctors Without Borders facility in Kailahun wear protective clothing when treating Ebola patients. Carl De Souza/AFP/Getty Images hide caption

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Carl De Souza/AFP/Getty Images

Has An Ebola Corner Been Turned? One Perspective: 'No, No, No, No'

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Illegal immigrants watch from behind a fence as police patrol the perimeter of a detention center at Amygdaleza, on the northern fringes of Athens, on April 30, 2012. Thanassis Stavrakis/AP hide caption

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Thanassis Stavrakis/AP