Anti-riot & terrorism drill held in Xi'an

Police officers exercise during an anti-riot & terrorism drill at a stadium in Xi'an, Northwest China's Shaanxi Province October 28, 2006. The drill was part of an effort to enhance their anti-terrorism capabilities. (newsphoto)

Police officers exercise during an anti-riot & terrorism drill at a stadium in Xi'an, Northwest China's Shaanxi Province October 28, 2006.(newsphoto)

A police officer takes aim during an anti-riot & terrorism drill at a stadium in Xi'an, Northwest China's Shaanxi Province October 28, 2006.(newsphoto)

A police dog jumps through hoops of fire as a policeman looks on at a stadium in Xi'an, Northwest China's Shaanxi Province October 28, 2006.(newsphoto)