Yale has made 170,000 Library of Congress photos of the US from 1935 to 1945 available online, searchable and sortable in many different ways.

In order to build support for and justify government programs, the Historical Section set out to document America, often at her most vulnerable, and the successful administration of relief service. The Farm Security Administration-Office of War Information (FSA-OWI) produced some of the most iconic images of the Great Depression and World War II and included photographers such as Dorothea Lange, Walker Evans, and Arthur Rothstein who shaped the visual culture of the era both in its moment and in American memory. Unit photographers were sent across the country. The negatives were sent to Washington, DC. The growing collection came to be known as “The File.” With the United State’s entry into WWII, the unit moved into the Office of War Information and the collection became known as the FSA-OWI File.

You can see the interactive MAP here