United States President Barack Obama discusses a lightweight portable disaster relief shelter designed by Jessica D&sbquo;&Auml;&ocirc;Esposito (R), Colton Newton and Anna Woolery (L) from Petersburg, Indiana representing the Pike Central High School InvenTeam, 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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