What does it mean to be a girl?

In the last few decades, a multi-billion dollar industry has evolved around princess stories and toys. But in contrast to this pink and purple ¿girlie¿ world are alternatives emphasizing more diverse interests and portraying different kinds of heroines. Gwen Ifill talks to author Peggy Orenstein and Angelica Perez of the Ella Institute about the influence of modern marketers and media on girls.