Changing public attitudes have led to a decline in U.S. soda sales. But health expert Marion Nestle believes many people still consume unhealthy amounts of sugary drinks. She argues beverage companies are spending millions on research that misleads consumers.
The founding dean of Harvard’s John F. Kennedy School of Government explains why nuclear terrorism is the greatest threat to America, and how to prevent it from happening.
- Graham Allison former assistant secretary of defense, professor of government at the Harvard University John F. Kennedy School of Government, and author of "Essence of Decision: Explaining the Cuban Missile Crisis."
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