A Palestinian boy plays with a balloon after Friday prayers on the first day of the Muslim holiday of Eid al-Adha in Jerusalem's Old City November 27, 2009. Muslims around the world celebrate Eid al-Adha to mark the end of the haj by slaughtering sheep, goats, cows and camels to commemorate Prophet Abraham. Eid al-Adha, also called "Festival of Sacrifice" or "Greater Eid", is a holiday celebrated by Muslims worldwide to commemorate the willingness of Ibrahim to sacrifice his son as an act of obedience to God.[Agencies]