Christian Cerria has helped Mid-Atlantic Builders shrink the number of workers needed on a work site. The firm uses smartphones and tablets to fix designs and send them back to the office without shuttling workers back and forth. Marie McGrory/NPR hide caption

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Peggy Renzi (middle) talks with her teammates Erika Hersey (left) and Erica Webster. The three are part of a team of nurses in the Bowie Health Center emergency room in Bowie, Md., who are working together to lose weight. Gabriella Demczuk /NPR hide caption

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Investigators are still looking into the cause of fires and overheating aboard Boeing's new 787s. Shizuo Kambayashi/AP hide caption

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New homebuilding reached a 4 1/2 year high in December, welcome news for an industry that lost 2 million jobs during the downturn. Despite those job losses, the sector is experiencing a labor shortage in some parts of the U.S. Tony Dejak/AP hide caption

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