A police dog held on by its handler patrols the subway in Shanghai June 5, 2006. Used to detect explosives on the Shanghai subway, 30 police dogs were organized into a team and started their duties on Monday.

Police dogs and handlers stand in line before a counter-terrorism drill in Shanghai June 5, 2006. Used to detect explosives on the Shanghai subway, 30 police dogs were organized into a team and started their duties today.

A police dog attempts to sniff out the suspicious piece of luggage during a counter-terrorism drill.

A police dog held on by its handler patrols the subway.

A police dog held on by its handler patrols the subway in Shanghai.

Police dogs, wearing tags that read "Metro Subway", run with their handlers before a counter-terrorism drill in Shanghai June 5, 2006. Used to detect explosives on the Shanghai subway, 30 police dogs were organized into a team and started their duties on Monday.

(China Daily June 6, 2006)