As our centennial series continues, and as the shooting of UnitedHealthcare's CEO led to an outpouring of frustration from consumers, Elisabeth Rosenthal, senior contributing editor at KFF Health News, former ER physician and author of An American Sickness: How Healthcare Became Big Business and How You Can Take It Back (Penguin Press, 2017), breaks down the perception and reality of health care and health insurance in the United States over the last century.