From site:
The United States Department of Energy Office of History and Heritage Resources, with the assistance of a graduate fellow, has been developing an interactive web site on the Manhattan Project. When completed, The Manhattan Project: An Interactive History will total some 120,000 words and over 200 pages and 500 images, including photographs, maps, and drawings. The site is being implemented incrementally, with the “Events of the Manhattan Project” and “Resources Relating to the Manhattan Project” sections the first part to go online.