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Pet cloning: Man's best friend, again

When their 12-year-old dog Marley was diagnosed with cancer, the Tschirhart family couldn't bear to say goodbye. So, they turned to ViaGen Pets, of Austin, Texas, a company that has cloned hundreds of pets for a multitude of grateful owners. Correspondent Tracy Smith checks out what the right amount of love, science and money can bring to an animal lover.
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