A trader washes the flow of the slaughter house as he wait for customers ahead of Muslim holiday of Eid al-Adha, at the Kiamako market in Nairobi on July 19, 2021. - Known as the "big" festival, Eid Al-Adha is celebrated each year by Muslims sacrificing various animals according to religious traditions, including cows, camels, goats and sheep. (Photo by SIMON MAINA / AFP)