Four Takeaways:

From Delmonico's to Howard Johnson's: Paul Freedman walks us through the 10 most influential restaurants in American history.

What kind of food fuels the City of Angels? Our host Kara Miller takes a trip to Los Angeles to explore the city's rich culinary culture

Judy Cockerton created the Treehouse Village and in the process, reformed the foster care system.

Next stop: The moon? A look at the future of the business of space