Assistants work on an installation made of wooden stools by Chinese artist Ai Weiwei as part of the exhibition 'Evidence' at the Martin-Gropius Bau in Berlin March 21, 2014. The exhibition opens from ... more 
Assistants work on an installation made of wooden stools by Chinese artist Ai Weiwei as part of the exhibition 'Evidence' at the Martin-Gropius Bau in Berlin March 21, 2014. The exhibition opens from from April 3 to July 7 in the German capital. REUTERS/Tobias Schwarz (GERMANY - Tags: ENTERTAINMENT) less 
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Reuters | Photo By TOBIAS SCHWARZ / REUTERS
Fri, Mar 21, 2014 9:01 AM EDT