Dolphins moving from concrete tanks to seaside sanctuary

Aired: 6/14/2016 | 0:09:45 | Clip
The eight dolphins at the National Aquarium in Baltimore live in sterile concrete tanks that bear no resemblance to their natural habitat, but soon they’ll be moving on up — down, actually — to an outdoor marine mammal sanctuary in Florida or the Caribbean. The sea change comes amid growing opposition to keeping dolphins and orcas in captivity. Science correspondent Miles O’Brien reports.