How will plunging oil prices affect the economy?

Watch Video | Listen to the Audio RELATED LINKS What’s behind the sudden drop in U.S. gas prices? Why Auto Sales Surge Even as Gas Prices Rise How innovation in oil and gas production is giving the U.S. a competitive edge JUDY WOODRUFF: Oil prices dropped again yesterday, this time approaching $70 a barrel after the OPEC cartel decided not to cut production levels. The decision comes after ...