VTech Radio Flyer

Modeled after the U.S. Department of Energy Solar Decathlon in Washington, D.C., the first Solar Decathlon Europe took place in Madrid, Spain, in June 2010. Tuesday, June 8 represented day 2 of the assembly period with teams hard at work reconstructing their solar-powered houses. (Credit: Carol Anna/U.S. Department of Energy Solar Decathlon)

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