US President Barack Obama (R) talks with Deidre Carrillo, of San Anotinio, TX, as she sits an electric car that was submitted to the Electrathon and NCWIT (National Center for Women & Information Technology) Aspirations in Communiting competition, during the White House Science Fair at the White House in Washington, DC, May 27, 2014. The White House Science Fair celebrates the student winners of a broad range of science, technology, engineering and math (STEM) competitions from across the country.       AFP PHOTO / Jim WATSON        (Photo credit should read JIM WATSON/AFP via Getty Images)