Truck supervisor Bernard Levey with his family in front of their home in the then-new Levittown, Pa., housing development in 1950. Bernard Hoffman/Time Life/Getty Images hide caption

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A stretch of I-95 near the Newark Airport in New Jersey. Timothy Bell For NPR hide caption

itoggle caption Timothy Bell For NPR

A shopper browses clothing at an Aeropostale store in Paramus, N.J. For retailers, the back-to-school shopping season is the second most important of the year, after Christmas. hide caption

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China has targeted the coastal city of Dalian as a high-tech innovation hub. AFP/Getty Images hide caption

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Citrus worker Audra Wilson packs oranges for customer orders Monday in Clermont, Fla. The fruit was picked before the freeze, but the grove owner estimates a 30 to 50 percent loss of the fruit still on the trees. John Raoux/AP hide caption

itoggle caption John Raoux/AP