Mapping the West with Lewis & Clark

Authors of s new book discuss the critical role that maps developed during the 1804-1806 expedition of Meriwether Lewis and William Clark played in President Thomas Jefferson's vision of a formidable republic that would no longer be eclipsed by European empires.
Speaker Biography: Ralph E. Ehrenberg is chief of the Library's Geography and Map Division.
For transcript and more information, visit www.loc.gov/tod...