Muslims, wearing protective masks as a precaution against infection from coronavirus gather for the Eid al-Adha prayer inside the Byzantine-era Hagia Sophia, recently converted back to a mosque, in the historic Sultanahmet district of Istanbul, Friday, July 31, 2020. Small groups of pilgrims performed one of the final rites of the Islamic hajj on Friday as Muslims worldwide marked the start of the Eid al-Adha holiday amid a global pandemic that has impacted nearly every aspect of this year's pilgrimage and celebrations. The last days of hajj coincide with the four-day Eid al-Adha, or "Feast of Sacrifice," in which Muslims slaughter livestock and distribute the meat to the poor. (Pool via AP)