One last visit to Downton Abbey before fans say goodbye

For the past five years, the Crawley family and their household of servants have entertained audiences with comedic one-liners from the Dowager Countess and dramatic calamity befalling nearly every character. Now the top-rated PBS drama of all time is drawing to a close. Judy Woodruff talks with creator Julian Fellowes, actress Elizabeth McGovern and others about the show.