Dolphins moving from concrete tanks to seaside sanctuary

The sea change comes amid growing opposition to keeping dolphins and orcas in captivity. More

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.

AIR DATE 6/14/16