From “Today girl” to the first female co-anchor of a network evening newscast, Barbara Walters ascended quickly through the ranks of network TV, shattering the glass ceiling all the way. Then, in the Seventies and ever since, conducting interviews with newsmakers and celebrities that often were as newsworthy and popular as the subjects of her inquiry.  Tonight, she becomes the interviewee for a while – but it’s the clips that will count the most here, a valuable compendium of pop-culture history whether or not you witnessed them the first time.