Beacon Power President and CEO Barry Brits, at the company's plant in Hazle Township, Pa. He says a loan from the Department of Energy made it possible for his company to develop its flywheel energy storage technology. Jeff Brady/NPR hide caption

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May 26, 2010: President Obama tours the Solyndra solar panel company with Executive VP of Engineering Ben Bierman. Correspondence shows how concerned some officials and others were about Solyndra's financial shape. Pool/Getty Images hide caption

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

itoggle caption Pool/Getty Images

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

itoggle caption Pool/Getty Images