At sea and on land, heightened Expo security

An anti-explosion drill for the upcoming Shanghai World Expo is held in Changshu in East China's Jiangsu province on April 6. The local public security bureau, criminal police, traffic police, fire-fighting, environmental protection and emergency aid departments took part in the drill. [Photo/chinanews.com.cn]

An anti-explosion drill for the upcoming Shanghai World Expo is held in Changshu in East China's Jiangsu province on April 6. [Photo/chinanews.com.cn]