CNN chief medical correspondent and neurosurgeon Dr. Sanjay Gupta says President Joe Biden should undergo cognitive testing following the recent presidential debate and should share his results with voters. Read Dr. Gupta's analysis: https://cnn.it/460uOYc | CNN

In his new book, Dr. Sanjay Gupta explores America’s chronic pain crisis, noting that 50 million people—about 20% of the population—suffer from it. He links the rise to aging, sedentary lifestyles, loneliness and inflammation, but stresses that pain doesn’t have to be as severe or long-lasting as many experience. | CBS Sunday Morning