Ken Burns documentary on U.S. Army Officers Meriwether Lewis, William Clark, and the Corps of Discovery's grueling, prolonged, and monumental explorative 1804 journey, which was initiated by Thomas Jefferson, began at St. Louis, and traversed the Pacific Northwest, does an excellent job of visualizing the participant's journey and capturing their ranging thoughts and emotions, but has a tendency to feel as lengthy and redundant as the journey itself. Uninspired guest commentator expousings don't add to the proceedings but fine photography does help to smoothen the ride.
