The experimental, personalized cell therapy that amps up the patient's own immune system has passed a critical milestone. An FDA advisory committee was unanimous in recommending full FDA approval of CAR T-cell therapy, which saved the life of Emily Whitehead, the first pediatric patient in the world to receive this treatment. She was cared for here at Children's Hospital of Philadelphia (CHOP). We share the success with the Hospital of the University of Pennsylvania and Novartis Pharmaceuticals. NBC Nightly News with Lester Holt has more on this extraordinary story.