Artists perform during a ceremony marking the 150th anniversary of the sack of the Summer Palace in Beijing, capital of China, Oct. 18, 2010. The Summer Palace, an imperial garden built in the Qing dynasty (1636-1911), was sacked and destroyed by the British and French forces on Oct. 18 and 19 of 1860 during the Second Opium War. [Xinhua/Luo Xiaoguang]