Peter Diamond, a Massachusetts Institute of Technology economics professor, beams during a Cambridge, Mass., news conference shortly after he won the 2010 Nobel Prize in economics on Oct. 11. Stephan Savoia/AP hide caption

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A United Airlines check-in counter at O'Hare International Airport M. Spencer Green/AP hide caption

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Biologists are relocating species such as this juvenile Mojave Desert tortoise due to the planned construction of BrightSource Energy's solar plant in southern California. Sarah McBride for NPR hide caption

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Arizona state Sen. Russell Pearce speaks in April during a vote on SB 1070, the immigration bill he sponsored. The final version resembled "model legislation" he helped draft during an ALEC conference in Washington, D.C., last year. Ross D. Franklin/AP hide caption

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Tony Hawk founded the Tony Hawk Foundation in 2002 to promote and help finance public skateparks in low-income areas. Rebecca Joelson hide caption

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Workers at the Cadbury chocolate factory in Bournville, England, join together chocolate Easter egg halves. Cadbury’s cream-filled eggs were first introduced in 1923. Fox Photos/Hulton Archive hide caption

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