Kahlan, a 12-year-old former child soldier, demonstrates how to use a weapon, at a camp for displaced persons where he took shelter with his family, in Marib, Yemen in this July 27, 2018 photo. Houthi rebels took Kahlan and his classmates, promising to give them new school bags, but instead they were enlisted and trained as fighters tasked with carrying supplies to the front lines. There, he had to elude explosions and airstrikes that left mangled casualties on the battlefield. “The sight of the bodies was scary”, he said. (Photo by Nariman El-Mofty/AP Photo)





A girl carries food aid she received from the local charity, Mona Relief, ahead of the holy month of Ramadan on the outskirts of Sanaa, Yemen on May 5, 2019. (Photo by Khaled Abdullah/Reuters)





Yemeni students crowd at a gap in the gate of a school to buy ice cream at break time, in Sana’a, Yemen, 09 February 2019. (Photo by Yahya Arhab/EPA/EFE)





A blacksmith sits in his shop at the Souq al-Melh market in the old quarter of Sanaa, Yemen, January 9, 2019. (Photo by Khaled Abdullah/Reuters)





Yaarub Eissa works at a blacksmith workshop in Abs in the northern province of Hajjah, Yemen on January 19, 2019. (Photo by Eissa Alragehi/Reuters)





A boy looks as a woman holds bread she just made outside her hut at a makeshift camp for internally displaced people near Sanaa, Yemen January 28, 2019. (Photo by Khaled Abdullah/Reuters)





A police officer prepares for the execution of Wadah Refat, 28, and Mohamed Khaled, 31, who were convicted of raping a 12-year-old boy in Aden, Yemen on February 6, 2019. (Photo by Fawaz Salman/Reuters)





Nurses measure the height of Afaf Hussein, 10, who is malnourished, at a clinic in Aslam, in the northwestern province of Hajjah, Yemen, February 17, 2019. Afaf, who now weighs around 11 kg and is described by her doctor as “skin and bones”, has been left acutely malnourished by a limited diet during her growing years and suffering from hepatitis, likely caused by infected water. She left school two years ago because she got too weak. (Photo by Khaled Abdullah/Reuters)





Supporters of the Houthi movement shout slogans as they attend a rally to mark the 4th anniversary of the Saudi-led military intervention in Yemen's war, in Sanaa, Yemen March 26, 2019. (Photo by Khaled Abdullah/Reuters)





People are seen outside a makeshift hut after they have fled fighting in Abs of the northwestern province of Hajja, Yemen on March 29, 2019. (Photo by Eissa Alragehi/Reuters)





Children play in a water at a sewage pool amid an increase of cholera patients in Sanaa, Yemen March 17, 2019. Picture taken March 17, 2019. (Photo by Khaled Abdullah/Reuters)





A man reacts as he lowers the body of his daughter to a grave during the burial of people who were killed by a blast in Sanaa, Yemen on April 10, 2019. (Photo by Khaled Abdullah/Reuters)





A bus driver queues at a petrol station amid a fuel shortage in Sanaa, Yemen on April 14, 2019. (Photo by Khaled Abdullah/Reuters)





Yemeni girls react as a volunteer sprays water to cool them down during the holy month of Ramadan in Sanaa, Yemen May 8, 2019. (Photo by Khaled Abdullah/Reuters)





A displaced girl, who fled from fighting in Taiz, is seen during the holy month of Ramadan in a slum on the outskirts of Sanaa, Yemen on May 7, 2019. (Photo by Khaled Abdullah/Reuters)





Yemeni coast guard officer shakes hands with members of the Houthi movement during withdrawal from Saleef port in Hodeidah province, Yemen on May 11, 2019. (Photo by Abduljabbar Zeyad/Reuters)





In this January 3, 2017 file photo, tribesmen loyal to Houthi rebels chant slogans during a gathering aimed at mobilizing more fighters into battlefronts to fight pro-government forces, in Sanaa, Yemen. Moroccan government officials said Thursday Feb. 7, 2019 that Morocco has stopped taking part in military action with the Saudi-led coalition in Yemen’s war, and has recalled its ambassador to Saudi Arabia. (Photo by Hani Mohammed/AP Photo)





In this July 26, 2017 file photo, a girl scavenges for recyclable items at a garbage dump in a street in Sanaa, Yemen. An Associated Press investigation finds that Yemen’s massive cholera epidemic was aggravated by corruption and official intransigence. The investigation has found that both the Iranian-backed Houthis rebels and their main adversary in the war – the U.S.- and Saudi-backed government that controls southern Yemen – impeded efforts by relief groups to stem the epidemic. (Photo by Hani Mohammed/AP Photo/File)





A boy walks behind a donkey used by another boy to transport water jerrycans in an improvised camp for internally displaced people near Abs of the northwestern province of Hajja, Yemen February 18, 2019. Picture taken February 18, 2019. (Photo by Khaled Abdullah/Reuters)





A Yemeni child holds missile shrapnel outside a factory after it destroyed in airstrikes carried out by warplanes of the Saudi-led coalition killing three civilians and injured six others on January 20, 2019 in Sana'a, Yemen. (Photo by Mohammed Hamoud/Getty Images)





A displaced child, who fled from fighting in Taiz, eats rice in a slum on the outskirts of Sanaa, Yemen May 7, 2019. Picture taken May 7, 2019. (Photo by Khaled Abdullah/Reuters)





A displaced Yemeni woman from Hodeida fills water containers at a make-shift camp in a village in the northern district of Abs in the country's Hajjah province, on May 9, 2019. The Yemeni conflict has triggered what the United Nations describes as the world's worst humanitarian crisis, with 3.3 million people still displaced and 24.1 million in need of aid. (Photo by Essa Ahmed/AFP Photo)