Pilgrims arrive to atend the Hajj season in the holy Saudi city of Meccca, on July 17, 2021. – Saudi Arabia hosts another downsized hajj from July 17, with only residents fully vaccinated against the coronavirus permitted and overseas Muslim pilgrims barred for a second year. The annual ritual is a central pillar of Islam and a must for able-bodied Muslims at least once in their lifetime. (Photo by Fayez Nureldine / AFP)