It's one of the most powerful and beautiful stories in all of Western culture: the son of God, born of a virgin in a manger in Bethlehem, his coming announced by angels, celebrated by shepherds and wise men. But is what the Bible tells us about the birth of Jesus really true? Where was Jesus born? When? How? And why? As the Christmas carol asks, "What child is this?" 48 Hours correspondent Maureen Maher explores these questions with curiosity and with respect.