During the Depression, Roy Emerson Stryker, head of the Farm Security Administration Historical Section, hired some of the best photographers in the United States--including Dorothea Lange, Gordon Parks, Walker Evans, Ben Shahn, Marion Post Walcott, John Delano, John Vachon, and Arthur Rothstein--to record the state of the country during its direst days. While Stryker made many demands on his photographers, he also gave them a great deal of freedom...