Turtles and tortoises are facing extinction like few other species groups. Nearly half of the 300+ species are at risk. The international pet trade is a major reason why. WCS’s Bronx Zoo, as a member of the Association of Zoos and Aquariums, is working to tackle the problem and the case of the radiated tortoise is a good example. Reporting: Dan RosenGuests: Kevin Torregrosa, Dr. Susie Bartlett