9-11: A look ahead

The emotional scars of 9/11

Pauline Boss is the nation's recognized expert on the concept of "ambiguous loss," and five years ago, she went to New York City to help the families of World Trade Center victims cope with their loss. She has been working with those families, friends and co-workers ever since.

Guests

• Pauline Boss: Professor emeritus of family social science at the University of Minnesota. Boss worked with several families of 9/11 victims in the early aftermath of the attacks. She remains in touch with some of them to this day.