the special holiday event, back to the beginning with christiane amanpour continues now. >> i'm christiane amanpour and we're on a journey back to the beginning. we've set off to try to unravel some of the history and the mysteries that lie behind the stories of the bible from genesis to jesus. we're overlooking the old city of jerusalem where so many stories unfolded. our journey is taking us to cities and deserts across the ancient world. so come along with us. after the great flood, the bible says that god made a promise to never again destroy the earth. noah's family prospered and the descendents spread across the