RFK Jr. says Americans were healthier when his uncle was president. Is he right?

President John F. Kennedy on August 4, 1961 on his way to a weekend on Cape Cod. As president, Kennedy valued exercise, physical fitness and vaccines.

American life expectancy in 1960 was almost ten years shorter than it is today. And the leading causes of death were chronic diseases. Robert F. Kennedy Jr. frequently tells a different story.

(Image credit: Bob Schutz/AP)