Displaced women at the Muna informal settlement outside Maiduguri. They're among more than 2 million people driven from their homes by Boko Haram attacks during northeastern Nigeria's 7-year insurgency. Ofeibea Quist Arcton/NPR hide caption

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Yemenis inspect the damage in a room at a hospital operated by the Paris-based aid agency Doctors Without Borders in Abs, in the northern province of Hajjah, on Tuesday. AFP/Getty Images hide caption

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The alleyway known as the Beira "corridor" is part of the city's informal prostitution zone, where sex workers wait to meet clients. Gianluigi Guercia/AFP/Getty Images hide caption

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Fighting HIV In Two High-Risk Groups: Sex Workers And Truck Drivers

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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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People gather their belongings Friday as they leave a refugee camp because of an Islamic State offensive near Azaz, Syria. Anadolu Agency/Getty Images hide caption

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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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Embedded Podcast: The 'High Highs' And 'Deep Lows' At A Doctors Without Borders Hospital

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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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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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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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As War Dangers Multiply, Doctors Without Borders Struggles To Adapt

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Firefighters combat a blaze on April 29, after regime helicopters targeted a medical center in an opposition-controlled region of Aleppo, Syria. Anadolu Agency/Getty Images hide caption

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A Cease-Fire In Name Alone

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A Wednesday night airstrike at a hospital in Aleppo, Syria, killed more than a dozen people. Beha el Halebi/Anadolu Agency/Getty Images hide caption

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Hospital Destroyed In Deadly Aleppo Airstrike, Doctors Without Borders Says

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