What one object in your life holds a special meaning to you? That's the question Bill Shapiro and Naomi Wax asked 150 people across the country. The results of their findings are captured in their new book What We Keep. From "everyday" people such as a barber to well-known folks such as Melinda Gates, the book tells the stories behind cherished personal belongings. Former Life editor, Shapiro shares his inspiration for the book, his most surprising discoveries, and what it taught him about what we value.