There are few places left in the world as majestic as Alaska's Copper River. This is a watershed bordered by massive glaciers. And the Copper River Delta forms the largest undivided wetland on the entire west coast of North America. Each spring its skies grow dark as millions of shore birds and water fowl return. And so do millions of salmon.

Producer Guy Hand went down the Copper River on a raft and found that facts and figures amount to only a fraction of this river's story.