
Muslims pray during the Eid al-Adha festival in Tehran, Iran, on Sept. 24, 2015. Muslims around the world celebrate Eid al-Adha, marking the end of the Hajj by slaughtering sheep, goats, cows and camels. (Xinhua/Ahmad Halabisaz)

Muslims pray during the Eid al-Adha festival in Tehran, Iran, on Sept. 24, 2015. Muslims around the world celebrate Eid al-Adha, marking the end of the Hajj by slaughtering sheep, goats, cows and camels. (Xinhua/Ahmad Halabisaz)