In this preview from the "Art in the Twenty-First Century" Season 6 episode, "Change," artist Ai Weiwei discusses "Untitled" (2011)—an outdoor installation at Harvard University—and the accompanying sound piece, "Remembrance" (2010).
"Change" premieres Friday, April 13, 2012 at 9:00 p.m. ET on PBS (check local listings).
For more information on Ai Weiwei, please visit:
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