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"Ai Weiwei: Never Sorry" profiles the Chinese artist and dissident whose art has served as a form of protest — and gotten him in trouble with the oppressive Chinese government.

His work has drawn acclaim worldwide and in China, where he has been called "the Beijing Andy Warhol."

But moving from art to activism holds its own dangers. As one interview subject says, "when you cross that line, that's where the fun ends with the Chinese government."

"Ai Weiwei: Never Sorry," directed by Alison Klayman, will debut in the U.S. Documentary competition at the 2012 Sundance Film Festival.

- Sean P. Means