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President Barack Obama hosts the White House Science Fair in Washington

President Barack Obama watches as pumps an fourteen year old Joey Hudy, from Phoenix, Arizona pumps the Extreme Marshmallow Cannon which he invented, while touring student science fair projects on exhibt in the State Dining Room at the White House 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. UPI/Molly Riley/Pool

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