German President Joachim Gauck lays down a flower at a plain metal plaque during his visit at the former Nazi concentration camp Buchenwald near Weimar, Germany, Tuesday, May 20, 2014. (AP Photo/Jens ... more 
German President Joachim Gauck lays down a flower at a plain metal plaque during his visit at the former Nazi concentration camp Buchenwald near Weimar, Germany, Tuesday, May 20, 2014. (AP Photo/Jens Meyer) less 
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Associated Press | Photo By Jens Meyer
Tue, May 20, 2014 9:18 AM EDT