United States Secretary of Energy Dr. Steven Chu speaks at 2009 Harvard Commencement Day
United States Secretary of Energy Dr. Steven Chu speaks at 2009 Harvard Commencement Day
United States Secretary of Energy Dr. Steven Chu addresses the crowd gathered at the Annual Meeting of the Harvard Alumni Association on Commencement Day at Harvard University at Harvard's Tercentenary Theatre in Cambridge, Massachusetts on June 3, 2009. (UPI Photo/Matthew Healey)
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