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2009 Solar Decathlon

People are reflected on Team Germany's window louvers with integrated thin-film copper indium gallium selenide (CIGS) cells modules during the 2009 U.S. Department of Energy Solar Decathlon on the National Mall in Washington, D.C., Tuesday, Oct. 13, 2009. (Photo by Stefano Paltera/US Dept. of Energy Solar Decathlon)

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Taken on October 13, 2009