The term ONE OF THE PILLARS OF ISLAM can be summarized by the four letter word HADJ. Hajj is an Islamic pilgrimage to Mecca, Saudi Arabia, and is one of the five pillars of Islam. It is a religious duty that must be carried out at least once in a lifetime by every able-bodied Muslim who can afford to do so. The Hajj is a demonstration of the solidarity of the Muslim people, and their submission to God.