Arizona PBS Previews

Nature: Fortress of the Bears

Preview | 30s

Sustained by a wealth of salmon streams, some 1,700 Alaskan brown bears are part of a unique circle of life that has played out on Admiralty Island for centuries. But for the first time, the salmon fail to arrive and the bears get a bitter taste of what the future may hold. (Also 11PM; Thu. 6/12 at 3AM; Sat. 6/14 at 6PM)