Nearly 7 million Americans currently live with Alzheimer’s and by 2060, experts say that number could be as high as 14 million. Scientists are trying to find out how one man has been able to stave off Alzheimer's for 25 years, despite having a rare genetic mutation that, doctors say, essentially guaranteed he’d develop the disease. Pam Belluck of The New York Times joins Ali Rogin to discuss.

See Full Page