"Eid al-Adha or Feast of Sacrifice is an important feast in the Muslim calendar. It concludes the Pilgrimage to Mecca. Eid al-Adha lasts for three days and commemorates Ibraham's (Abraham) willingness to obey God by sacrificing his son. Muslims believe the son to be Ishmael rather than Isaac as told in the Old Testament. Ishmael is considered the forefather of the Arabs. According to the Koran, Ibrahim had a dream in which he was told to sacrifice his most valued possession, he sacrificed his favourite goat and his favourite sheep but the dream reoccurred. He realised the dream meant his son. His son said he must do as Allah commanded. He blind folded himself and sacrificed his son, a voice from heaven told him to look down and he realised he had sacrificed a ram instead. Allah told him it had been a test to see how much Ibrahim and Ishmael loved Allah.
The feast re-enacts Ibrahim's obedience by sacrificing a cow or ram. The family eats a third of the meal, a third is given to family and friends and the remaining third is given to the poor. There are prayers and sermons, mutual visiting of friends, lavish meals, and especially for children the giving of presents and the wearing of new clothes."
I personally think the bull in the NY/Bin Laden picture represents the sacrifice of Eid al-Adha, not Wall Street -- but that's just my opinion.