Two Centuries Ago, an American epic unfolded as Lewis and Clark's Corps of Discovery mapped the lands, described the natural wonders, and encountered the peoples of western North America. Following orders from President Thomas Jefferson, Captains Meriwether Lewis and William Clark set out from St. Louis in 1804 to search for a river passage to the Pacific Ocean. The heroism of the men of the Corps of Discovery and of Sacagawea, the Shoshone interpreter...