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Ken & Rosie: When should lab chimpanzees be retired?

07:41

Ken and Rosie are 30-year-old chimpanzees that were born in research labs and have spent most of their lives in labs dedicated to finding cures for human diseases. Some experts who support medical testing on chimps believe, at some point, the animals should be retired. A visit to a sanctuary housing retired lab chimps reveals that some of the animals still exhibit symptoms of stress from their time in the labs. Lisa Myers reports.