Knute Berger shares the story of the Northwest's largest river, from its headwaters in Canada to the threat that climate change poses to its watershed.
George Francis Train, an 1800s influencer, once convinced a newspaper to sponsor him on a record-breaking trip around the globe. Knute Berger explains.
Asahel Curtis shot thousands of images in the early 20th century. Knute Berger talks about the effort to share them with the public for the first time.