Hala Majed Oqbah (R) and her cousin Aradah Mohammed Oqbah take a rest while they try out prosthetic limbs at a rehabilitation center in Sanaa, Yemen, on Oct. 18, 2018. Yemeni girls Hala Majed Oqbah and Aradah Mohammed Oqbah, who both lost one leg in an airstrike this year while they were playing outside their house in Ibb province, tried out prosthetic limbs provided by UNICEF at a rehabilitation center on Thursday. Aerial attacks and street fighting took hold of most of Yemen in 2015 and put millions of civilians, especially children, in danger. Between March 2015 and August this year, more than 6,500 children have been confirmed killed or injured, according to statistics from UNICEF. (Xinhua/Mohammed Mohammed)

Hala Majed Oqbah (front) and her cousin Aradah Mohammed Oqbah try out prosthetic limbs at a rehabilitation center in Sanaa, Yemen, on Oct. 18, 2018. Yemeni girls Hala Majed Oqbah and Aradah Mohammed Oqbah, who both lost one leg in an airstrike this year while they were playing outside their house in Ibb province, tried out prosthetic limbs provided by UNICEF at a rehabilitation center on Thursday. Aerial attacks and street fighting took hold of most of Yemen in 2015 and put millions of civilians, especially children, in danger. Between March 2015 and August this year, more than 6,500 children have been confirmed killed or injured, according to statistics from UNICEF. (Xinhua/Mohammed Mohammed)

Hala Majed Oqbah (rear) and her cousin Aradah Mohammed Oqbah try out prosthetic limbs at a rehabilitation center in Sanaa, Yemen, on Oct. 18, 2018. Yemeni girls Hala Majed Oqbah and Aradah Mohammed Oqbah, who both lost one leg in an airstrike this year while they were playing outside their house in Ibb province, tried out prosthetic limbs provided by UNICEF at a rehabilitation center on Thursday. Aerial attacks and street fighting took hold of most of Yemen in 2015 and put millions of civilians, especially children, in danger. Between March 2015 and August this year, more than 6,500 children have been confirmed killed or injured, according to statistics from UNICEF. (Xinhua/Mohammed Mohammed)

Hala Majed Oqbah (front) and her cousin Aradah Mohammed Oqbah try out prosthetic limbs at a rehabilitation center in Sanaa, Yemen, on Oct. 18, 2018. Yemeni girls Hala Majed Oqbah and Aradah Mohammed Oqbah, who both lost one leg in an airstrike this year while they were playing outside their house in Ibb province, tried out prosthetic limbs provided by UNICEF at a rehabilitation center on Thursday. Aerial attacks and street fighting took hold of most of Yemen in 2015 and put millions of civilians, especially children, in danger. Between March 2015 and August this year, more than 6,500 children have been confirmed killed or injured, according to statistics from UNICEF. (Xinhua/Mohammed Mohammed)