Dr. Eric Topol on the science of longevity when science is in peril

Cardiologist, scientist and bestselling author Dr. Eric Topol's new book "Super Agers" distills decades of research on how to make us healthier for longer. Topol says that humanity is on the cusp of developing treatments to help tame cancer, dementia and other chronic diseases… just as political forces in the U.S. are shutting down that research.