Afaf Hussein, 10, who is malnourished, looks from the window of a taxi during her trip back from treatment in Sanaa to her home village of al-Jaraib in the northwestern province of Hajjah, Yemen, February 16, 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. REUTERS/Khaled Abdullah SEARCH "YEMEN HUNGER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Khaled Ismael kisses the hand of his daughter, Radhiya, 17, who had her left arm amputated due to cancer, at their house in Amran, Yemen, August 10, 2018. "I spent all our valuables and had to borrow a lot of money to cover the expenses of my daughter's treatment. In the end, we couldn't afford a good treatment," Khaled Ismael said. "Because of our inability to travel abroad, my daughter did not get enough treatment and her arm had to be amputated," he added. "The war has devastated our lives." REUTERS/Khaled Abdullah SEARCH "YEMEN CANCER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A man stands next to cars damaged by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY 

A man stands next to cars damaged by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY 

People check damage at the site of an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY 

People gather on a street where a house was destroyed by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

People search in the rubble of a house destroyed by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

People stand on the rubble of a house destroyed by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

People check damage at the site of an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

A man stands next to cars damaged by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

People check damage at the site of an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

A man searches in the rubble of a house destroyed by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

People search in the rubble of a house destroyed by an air strike in Amran, Yemen June 25, 2018. REUTERS/Khaled Abdullah 

A child sits outside a tent at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi 

Women wash clothes near tents at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi 

A girl looks in front of tents at a camp for people displaced by the war in Khamir area of the northwestern province of Amran, Yemen May 25, 2017. REUTERS/Mohamed al-Sayaghi 

A woman sits inside a tent at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi 

A woman cooks inside a tent at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi 

A girl stands in front of tents at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi 

People stand near a tent at a camp for people displaced by the war in the Khamir area of the northwestern province of Amran, Yemen, May 25, 2017. REUTERS/Mohamed al-Sayaghi? 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY

A man walks amidst the rubble of a school hit by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People stand at the yard of a school hit by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

A man shows a fragment of a missile he picked up at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

A man sleeps after he took part in a search and rescue operation at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People gather at a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

A man sits near others amidst rubble of a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY

A man sits near others amidst rubble of a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

People stand amidst rubble of a building destroyed by Saudi-led air strikes in the northwestern city of Amran, Yemen September 8, 2016. REUTERS/Khaled Abdullah 

Girls ride on the back of a truck with their father as they flee their home, to Yemen's capital Sanaa, after Saudi-led air strikes hit their area in the northwestern province of Amran, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

Girls ride on the back of a truck with their father as they flee their home, to Yemen's capital Sanaa, after Saudi-led air strikes hit their area in the northwestern province of Amran, August 29, 2015. REUTERS/Khaled Abdullah 

A boy sits next to a car destroyed by a Saudi-led air strike in Yemen's northwestern province of Amran, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

Girls ride on the back of a truck with their father as they flee their home, to Yemen's capital Sanaa, after Saudi-led air strikes hit their area in the northwestern province of Amran, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

A man looks at a truck hit by a Saudi-led air strike in Yemen's northwestern province of Amran August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

A man and his son walk past a truck hit by a Saudi-led air strike in Yemen's northwestern province of Amran, Yemen, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

A man walks past a truck hit by a Saudi-led air strike in Yemen's northwestern province of Amran, Yemen, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

People gather near a truck hit by a Saudi-led air strike in Yemen's northwestern province of Amran, Yemen, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

People gather near a truck hit by a Saudi-led air strike in Yemen's northwestern province of Amran, Yemen, August 29, 2015. Warplanes from a Saudi-led coalition killed 10 people in air raids in central Yemen on Friday, local officials said. REUTERS/Khaled Abdullah 

A boy plays on a swing on the gate of his house in the historic city of Thula in Yemen's northwestern province of Amran August 20, 2015. REUTERS/Mohamed al-Sayaghi 

Girls carry buckets they filled with water from a water pond amid an acute shortage of water supply to houses in the historic city of Thula in Yemen's northwestern province of Amran August 20, 2015. War-torn Yemen is on the brink of famine, with millions of women and children most at risk of starvation as fighting around major ports stalls imports of food and other humanitarian aid, according to the United Nations. REUTERS/Mohamed al-Sayaghi 

Girls carry buckets they filled with water from a water pond amid an acute shortage of water supply to houses in the historic city of Thula of Yemen's northwestern province of Amran August 20, 2015. War-torn Yemen is on the brink of famine, with millions of women and children most at risk of starvation as fighting around major ports stalls imports of food and other humanitarian aid, according to the United Nations. REUTERS/Mohamed al-Sayaghi 

A man walks on the rubble of his house destroyed by Saudi-led air strikes on the nearby offices of the education ministry's workers union in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather in front the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather on the rubble of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants look at the headquarters of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather on the rubble of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

A man looks at the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

A Houthi militant walks inside the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather on the rubble of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather on the rubble of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants gather in front the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

A Houthi militant walks past the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants step on posters of Yemen's exiled President Abd-Rabbu Mansour Hadi in front the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

Houthi militants salvage documents from under the rubble of the offices of the education ministry's workers union, destroyed by Saudi-led air strikes, in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

A man and his son walk past a car destroyed by Saudi-led air strikes on the nearby offices of the education ministry's workers union in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah 

A Houthi militant checks documents loaded on a van destroyed by Saudi-air strikes on the offices of the education ministry's workers union in Yemen's northwestern city of Amran August 19, 2015. A Saudi-led Arab coalition has been bombarding the Iranian-allied Houthi rebel movement - Yemen's dominant force - since late March in a bid to reinstate exiled President Abd-Rabbu Mansour Hadi, who has fled to Riyadh. REUTERS/Khaled Abdullah