When President Thomas Jefferson bought the Louisiana Territory from Napoleon, he doubled the country's size. The sudden western expansion of the United States--and rumors of a Northwest Passage that would link the Atlantic with the Pacific--motivated Jefferson to find the great byway to the West. He appropriated $2,500 for the journey and commissioned his secretary, Meriwether Lewis, to the task of revealing the West. Lewis asked his old friend, William Clark, and a group of rough frontiersmen to join the expedition, now called the Corps of Discovery. This Ken Burns documentary chronicles the challenges, frustrations and anxiety that faced the Corps of Discovery -- their encounters with Native Americans, the new animals and plant life they discovered, their historic pairing with Sacagawea, and their crossing of the Continental Divide.
Part two airs Tuesday, July 16 at 7:00 p.m.