In Search of the 10 Commandments

St. Katherine's monastery. Located near the base of Gebel Musa, this Greek Orthodox monastery was founded in the 4th century A.D. According to the monks who live here, Gebel Musa is at the site of the true Mount Sinai. Within the monastery's walls is said to be the burning bush from which God spoke to Moses. "We are devoted here to the memory of the prophet Moses and to the revelation of God to Moses," says Father Justin, an American monk who has lived at the monastery since 1996. (Ely Brown / ABC News)