On Passover, we commemorate the Exodus from Egyptian slavery. The following is a brief summary: Moses, joined by his older brother Aaron, went to Pharaoh and demanded the release of the Israelites. Pharaoh repeatedly said no--nine times. Each time he said no, another plague (blood, frogs, lice, wild animals, pestilence, boils, hail, locusts and darkness) struck Egypt. Finally, God struck…