Recently, one of our children's class had the opportunity to tour the Hanford Site. Coincidently, the Los Angeles Times was there creating an essay featuring the Manhattan Project National Park. You can read about the LA Times article and view many photos here. For more information on touring the Manhattan Project National Historic Park at Hanford Washington, visit the National Park Service's Manhattan Page or NPS's B Reactor Tour Page.
The Manhattan Project
The Manhattan Project was a research and development project that produced the first nuclear weapons during World War II. It was led by the United States with the support of the United Kingdom and Canada. For more, see Wikipedia.