CARDA volunteer Rebeccah Riley and her Catahoula mix search dog, Maggie Mae.
They're a familiar sight on the news after a disaster: search-and-rescue teams using dogs to find victims. Many of those canine teams are volunteers. The California Rescue Dog Association, or CARDA, is the largest such group in the nation. It used to focus more on wilderness work -- but it's becoming more involved in search-and-rescue in metropolitan areas. Reporter: Rachel Dornhelm
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