The decision by Bill and Melinda Gates to end their marriage after 27 years follows a trend of more couples calling it quits later in life.

So-called "gray divorces" reflect a shift in attitude and demographics about marriage in the U.S.

Today on All Sides with Ann Fisher, a look at the institution of marriage--what's changing and what's not.

Guests:
Susan L. Brown, co-director of the National Center for Family and Marriage Research at Bowling Green State University
Randi Cohen, mental health counselor and collaborative divorce coach
John Duffy, clinical psychologist and family therapist