Ceremonies from Virginia to Oregon are marking the 200-year anniversary of the beginning of the epic journey of discovery by Lewis and Clark. But as NPR's Brian Ceremonies from Virginia to Oregon ...

U.S. Army Captain Meriwether Lewis and 2nd Lt. William Clark — plus the Corps of Discovery — returned to St. Louis after epic travels to the Pacific Ocean on this day in history, Sept. 23, 1806.

With up-to-date knowledge of his route, and carte blanche to form the Corps of Discovery, Lewis asked his old comrade, Clark, to accompany him. The two men privately agreed to lead together ...