President Barack Obama, with Professor Vladimir Bulovic, tours an alternative energy research laboratory at Massachusetts Institute of Technology in Cambridge, Mass., Oct. 23, 2009. (Official White House Photo by Pete Souza)


This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House

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Taken on October 23, 2009