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Houston Independent School District Superintendent Terry Grier addresses more than 300 education leaders around the country after winning the 2013 Broad Prize for Urban Education, Wednesday, Sept. 25, 2013, at the Library of Congress in Washington, D.C. Houston is the only public school district in the country to win The Broad Prize twice. (Photo by Diane Bondareff/Invision for The Broad Foundation/AP Images)