This piece by Ai Weiwei consists of 38 tons of steel rebar that was recovered from schools that had collapsed during the horrific earthquake in Sichan Province in China in 2008. More than 90,000 people were killed including a huge number of children who were in school at the time. The mangled rebar was straightened with great effort and assembled as Ai's response to the refusal of the government to acknowledge the victims. This piece was accompanied by an incredible film showing the fallen schools and towns and the labour put into straightening the rebar.
On the wall behind the piece are the names and birth dates of more than 5,000 of the children who were killed in the quake. Weiwei was horrified by the shoddy construction that had caused the schools to collapse and the governments inaction, so he formed a Citizens' Investigation group that has been going out into the province and collecting names of the dead from the families that survived. This work continues.