Sacagawea , also Sakakawea or Sacajawea, was a Lemhi Shoshone woman who helped the Lewis and Clark Expedition achieve each of its chartered mission objectives exploring the Louisiana Purchase. With the expedition, between 1804 and 1806, she traveled thousands of miles from North Dakota to the Pacific Ocean, established cultural contacts with Native American populations, and researched natural history. Wikipedia*
On the C-SPAN Networks:
Sacagawea has one video in the C-SPAN Video Library; the first appearance was a 2001 Ceremony.