United States President Barack Obama talks with Ana Nieto (R) of Presidio, Texas, team leader of Team America Rocketry Challenge (TARC) along with teammates Janet Nieto (3nd R) and and Gwynelle Condino (2nd R) while touring student science fair projects on exhibt at the White House in Washington, D.C. on February 7, 2012.  Obama hosted the second White House Science Fair celebrating the student winners of science, technology, engineering and math (STEM) competitions from across the country..Credit: Molly Riley / Pool via CNP
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