A policeman trains his police dog to sniff a pipe for explosives in Beijing, July 2, 2008. A total of 204 sniffer dogs and their masters from the country's 20 provinces be responsible for security in Beijing during the Olympic and Paralympic Games from August.

Members of the police staff train their sniffer dogs to search for explosives around the stands at an Olympic venue in Beijing, July 2, 2008. A total of 204 sniffer dogs and their masters from the country's 20 provinces will be responsible for security in Beijing during the Olympic and Paralympic Games from August.