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The Solar Impulse, a solar-powered plane, flies over Switzerland. The makers will be journeying across the U.S. this spring, hoping the flight helps challenge assumptions about what solar technology can do. Courtesy of Solar Impulse hide caption

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Courtesy of Solar Impulse

May 26, 2010: President Obama tours the Solyndra solar panel company with Executive VP of Engineering Ben Bierman. Pool/Getty Images hide caption

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Pool/Getty Images