Associated Press
In a Thursday, April 12, 2012 photo, Daniel Poneman, the deputy secretary for the U.S. Department of Energy, center, is given a tour of the West Tennessee Solar Farm by two project managers in Stanton, Tenn. Hundreds of industry members gathered this week in Memphis for a solar energy symposium and the dedication of a 1 megawatt solar farm. Industry leaders also met in Stanton, where Tennessee's largest solar generating facility uses its more than 21,000 panels to harness the sun's energy to output 5 megawatts of power. (AP Photo/Adrian Sainz)

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