He is the subject of the 2012 documentary film '' Ai Weiwei : Never Sorry '' , directed by American filmmaker Alison Klayman , which received a special jury prize at the 2012 Sundance Film Festival and opened the Hot Docs Canadian International Documentary Festival , North America 's largest documentary festival , in Toronto on 26 April 2012
2012 Sundance Film Festival
2012 Sundance Film Festival
Ai Weiwei