Chinese artist Ai Weiwei is now as notorious for his political actions as for his work. Alison Klayman's new documentary, Ai Weiwei: Never Sorry, shows that his originality comes precisely from combining the two.

Dissident Wuer Kaixi talks about fellow activist Chen Guangcheng, his own attempt to return to China, and his continued hope for “counter-talk” with the regime that exiled him.