XIAN, CHINA - JUNE 1: Girls play at a monument for the Silk Road on June 1, 2007 in central Xian, China. The city has about 3,3 million inhabitants and is the capital of Shaanxi province in China. It was the eastern terminus for the Silk Road and the location for the Terracotta Army during the Qin Dynasty. Its history dates back more than 3,100 years. (Photo by Per-Anders Pettersson)...