Memories are easy to come by for anyone who sifts through piles of old family photographs. But what about pictures of people you've never met and places you've never been? For author Lawrence Sutin, these images were even more useful than a family album in sparking his memories. In his new book, "A Postcard Memoir", Sutin relies on 97 antique postcards to help chronicle moments in his life. Sutin says he first began collecting old postcards during the 1970s.