9 / 20
FILE - In this June 23, 2011 file photo, activist artist Ai Weiwei opens the gate to talk to journalists gathered outside his home in Beijing. Representatives of Ai's design firm entered a closed hearing Thursday, July 14, 2011 to challenge a US$1.85 million tax bill delivered by authorities after the dissident was released from nearly three months' detention. (AP Photo/Ng Han Guan, File)