Amy Mossett, tourism director for the Three Affiliated Tribes, or TAT, is also the country's foremost Sacagawea impressionist. Mosset gives interpretive talks to visitors, sharing information about the fabled guide. The TAT (Mandan, Arikara and Hidatsa) reservation stretches over a braod reach of North Dakota.
Lewis and Clark braved the unknown waters of the Missouri to chart America's future. As we approach the 200th anniversary of their sojourn, TIME reflects upon their sacrifice and achievement