In this Ask a Rabbi video, learn why Passover is the celebration of the liberation of the ancient Israelites from slavery in Egypt. They left Egypt, crossing the Red Sea into the Sinai desert to Mount Sinai to receive the Torah and finally stopped in the promised land of Israel. One of the foods that is used in the celebration is Matzos; it is an unleavened bread that takes 18 minutes to make and is hard like a cracker.