I heard this on the radio, and found it on a local news site, and wanted to share. Just one photo though, It consists of images made in Legos of prisoners of conscience, past and present. The exhibit is in the old prison on Alcatraz Island in San Francisco Bay. Here is a link to the story, it has several parts to the exhibit, the Lego is one part.
http://www.sfgate.com/art/article/Art-review-Ai-Weiwei-installation-on-Alcatraz-5775639.php#photo-6899695