A man pulls a sheep at a livestock market ahead of Eid al-Adha festival in the outskirts of Aden, Yemen, Aug. 5, 2019. Eid al-Adha festival is one of the most important festivals for Muslims, which will begin on Aug. 11 this year in Yemen. (Photo by Murad Abdo/Xinhua)

A seller is seen with his sheep at a livestock market ahead of Eid al-Adha festival in the outskirts of Aden, Yemen, Aug. 5, 2019. Eid al-Adha festival is one of the most important festivals for Muslims, which will begin on Aug. 11 this year in Yemen. (Photo by Murad Abdo/Xinhua)

A seller waits for customers at a livestock market ahead of Eid al-Adha festival in the outskirts of Aden, Yemen, Aug. 5, 2019. Eid al-Adha festival is one of the most important festivals for Muslims, which will begin on Aug. 11 this year in Yemen. (Photo by Murad Abdo/Xinhua)

A seller is seen with his sheep at a livestock market ahead of Eid al-Adha festival in the outskirts of Aden, Yemen, Aug. 5, 2019. Eid al-Adha festival is one of the most important festivals for Muslims, which will begin on Aug. 11 this year in Yemen. (Photo by Murad Abdo/Xinhua)