PBS Newshour: Known for Single Act of Defiance, Rosa Parks Trained for Life Full of Activism

What do you really know about the life and legacy of civil rights pioneer Rosa Parks? Gwen Ifill talks with biographer Jeanne Theoharis, whose book "The Rebellious Life of Mrs. Rosa Parks" offers a complex portrait of the woman best known for refusing to give up her seat on an Alabama bus in 1955.