US President Barack Obama tours the Acropolis in Athens, Greece, on Wednesday, November 16. Obama is making &amp;lt;a href=&amp;quot;http://www.cnn.com/2016/11/15/us/gallery/obamas-final-trip/index.html&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;his last international trip as president,&amp;lt;/a&amp;gt; visiting Greece, Germany and Peru.