The story of the Corps of Discovery, retold by renowned director Ken Burns. Meet the expedition's two famous captains as well as young army men, French-Canadian boatmen, Clark's slave York and the courageous Shoshone woman Sacagawea, who brought her infant son on this momentous journey. This comprehensive film tells a grand story, not only of America's history, but of its promise. Made in the U.S.A. 240 minutes.