Support WBURIt's A Bird! It's A Plane! It's ... A Dog Dangling From A Helicopter?!Play05:02Download AudioAilsa ChangMarch 27, 2019 ShareHenry, a border collie with the Canadian Avalanche Rescue Dog Association, flies with his handler over ski slopes in the Canadian Rockies. He is one of six dogs profiled in the IMAX film Superpower Dogs. (Cosmic Picture Limited)
