and now, we sail down the nile. what new information did we find about the pyramids? and does it have anything to do with moses? "back to the beginning with christiane amanpour" continues. >> we start the next leg of our journey with captain ahmad at the helm and a warm wind at our back. as this sails up the river nile, the modern world seems to melt away. and i'm struck by the power and the history of egypt's majestic waterway. we're here because this is the backdrop for the bible's timeless story of freedom and redemption. this is where the moses story begins. his mother had put him inside a reed basket and placed him on