Bison being returned to Banff National Park 

Bison were once so plentiful they roamed Canada by the millions, but only a few thousand remained by the late 1800s. Now there's a plan to reintroduce them to one of Canada's most popular national parks -Banff. But as Jayme Doll reports, not everyone is convinced trying to recreate the past is such a great idea. For more info, please go to www.globalnews.ca