Latest drugs challenge canine sniffers

It's not just narcotics officers and lawmakers who need to keep up with the rapid development of new types of illegal recreational drugs, but also sniffer dogs at the General Administration of Customs' canine training center in Beijing.

With dozens of suitcases lined up in two rows on the center's training ground, Fun, a 3-year-old Labrador sniffer dog, takes just 10 seconds to find the one containing drugs.

Fun sits obediently in front of the suitcase while his handler, customs officer Yu Xiaodong, crouches and pats him on the head as encouragement. Yu then uses a rolled-up towel to play a tug-of-war game with Fun.