If a Pilgrim were to attend a contemporary Thanksgiving celebration, he or she would probably be stunned by today’s traditional foods. In this special episode of BackStory, a discussion of Puritan foods with historian James McWilliams. Also, religion scholar Anne Blue Wills reveals the surprising, 19th century origins of this national holiday. And we hear from legendary NFL quarterback Roger Staubach about what it was like to spend every turkey day on the football field.