Today with Google Earth you can view satellite imagery of areas such as Los Alamos and Oak Ridge, which did not publicly exist in 1945.
On July 16, 1945, science fiction became real as a device with 13.5 pounds of plutonium produced an explosion equivalent to 21 kilotons of TNT. Note - that is thousand tons, not simply tons.
After spending 2$B in 3 years, an unlikely pair, General Leslie Groves and Robert Oppenheimer changed the world. I enjoy the film, Fat Man and Little Boy, which reenacts the Manhattan Project. There is some theatrical license in the storyline, but it provides a good history lesson of what a nation can accomplish.
The Department of Energy has created a Manhattan Project Resource which has an interactive history and the Manhattan District History. The latter was 36-volume commissioned by General Groves as a history lesson of how, when, and where. Even though the first blast was 68 years ago, there are still some classified sections in this set that are being declassified, redacted, or deleted in the public release. (They still are not going to give away the secrets on producing an atomic weapon.)
The map on the left shows the secret enclave of production workers that would be assembled to produce the nuclear material. Note Norris Lake, one of the TVA projects that produced the gigawatts of electricity required for the project.
Mmm. It was an interesting time and unbelievable things were accomplished. It was a model for the U.S. moon launch. Any ideas?