Misty Copeland talks 'Black Ballerinas'; Physics pioneer Dr. Chien-Shiung Wu

American Ballet Theatre star Misty Copeland published the nonfiction kids book "Black Ballerinas" in November. We present an excerpt of a December event centered around the book. And, Washington Post reporter Jada Yuan reflects on the public and private life of her grandmother Dr. Chien-Shiung Wu, a trailblazing nuclear physicist who many say should have won the Nobel Prize.