In Mexico City, moths find a home at the museum

The butterfly sanctuary in Mexico City's Natural History Museum is now the host of thousands of Orizaba silkmoths. Those moths have been steadily decreasing in number in the city due to urbanization. But 2,600 cocoons of the silkmoth were rescued from an empty lot, cleaned and hung up from clothing lines by biologists at the museum. Host Carolyn Beeler has the details.