Photos of Ben Shahn, Russell Lee and Marion Post Wolcott

Timothy Egan, a Pulitzer Prize winner and writer for The New York Times, has written the introduction to "The Photographs of Ben Shahn," one of three Library of Congress-published books in the "Fields of Vision" series. He led a discussion of the photos of the Farm Security Administration focusing on the three photographers in the series: Ben Shahn, Russell Lee and Marion Post Wolcott.