The Columbia River is among the world's largest watersheds, so it's no wonder that even devoted salmon and steelhead anglers often lack an understanding of the threats to the river's salmonids. For a thorough, entertaining, and inspiring lesson on all that's gone wrong with our current management strategies and all that is posed to go right, I highly recommend Nature's Running the Gauntlet, which can be watch in its entirety for free by following the link below. The film features some of salmon conservation's leading voices, include David James Duncan.
http://video.pbs.org/video/1891112523
High recommendations.