From a visit to NASA to years of hosting the White House science fair, President Obama has been known to nerd out on occasion.
원문출처 : http://www.cnn.com/videos/politics/2016/10/11/president-obama-loves-science-origwx-bw.cnn
원문출처 : http://www.cnn.com/videos/politics/2016/10/11/president-obama-loves-science-origwx-bw.cnn