Children choir from Thomas Elementary School perform during the celebration marking the Universal Children's Day and the 20th anniversary of the Convention on the Rights of the Child, at Washington Convention Center in Washington, D.C., capital of the US, November, 20, 2009.  [Xinhua]

Children choir from Thomas Elementary School perform during the celebration marking the Universal Children's Day and the 20th anniversary of the Convention on the Rights of the Child, at Washington Convention Center in Washington, D.C., capital of the US, November 20, 2009. [Xinhua]