WASHINGTON, D.C. - MAY 19: President Obama awards National Medals of Science and of Technology on May 19, 2016 in Washington, D.C. The ceremony recognized the contributions of top scientists.
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WASHINGTON, D.C. - MAY 19: President Obama awards National Medals of Science and of Technology on May 19, 2016 in Washington, D.C. The ceremony recognized the contributions of top scientists.