Palestinians gather to celebrate alongside Muslims worldwide the first day of the al-Adha feast, at the al-Aqsa Mosque complex in Jerusalem's old city, on July 20, 2021. - The al-Adha, or "Feast of Sacrifice", marks the end of the annual pilgrimage or Hajj to the Saudi holy city of Mecca and is celebrated in remembrance of Abraham's readiness to sacrifice his son to God. (Photo by AHMAD GHARABLI / AFP)