American explorer Meriwether Lewis is best known for his efforts in the early 1800s to chart the Louisiana Purchase territory. His expedition with William Clark paved the way for the westward expansion of the United States. After the journey, President Thomas Jefferson appointed Lewis as Governor of the Louisiana Territory. While on a trip from St. Louis to Washington D.C. in 1809, Lewis died under circumstances that, to this day some 200 years later, remain a mystery. VOA's Kane Farabaugh has more from Tennessee.