Dr. Sanjay Gupta on Life, Death, Parenting and Chores

Dr. Sanjay Gupta, neurosurgeon & CNN Chief Medical Correspondent, weighs in on over-parenting, the unforgettable chores that shaped his childhood, his transformation from unmotivated to driven high school student, and the legacy he hopes to leave. That plus the latest on how physical exercise impacts the brain -- and advice to kids who might want to try marijuana.