President Barack Obama looks over a remotely operated vehicle to help firefighters with ice search and rescue calls developed by Olivia Van Amsterdam, left, and Katelyn Sweeney, center, as he toured the 2014 White House Science Fair exhibits that are on display in the State Dining Room of the White House in Washington, Tuesday, May 27, 2014. Obama was celebrating the student winners of a broad range of science, technology, engineering and math (STEM) competitions from across the country. (AP Photo/Susan Walsh)
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