"We've been predicting the end of the world for thousands of years. From Nostradamus all the way back to the book of revelation. Something about the drama of annihilation seems to grip us. Is it just human nature to worry and wonder about the end of days? Or is it really coming? I'm setting off on a journey to find out why so many religions predict an apocalypse. … My first destination is Jerusalem. The spiritual set of the Jews, christians and muslims. All three of those faiths predicted Jerusalem will play a role in the end of the world. It has long been a flash point for religious tensions."