Manhattan Project

Different fission bomb assembly methods explored during the July 1942 conference
A selection of US and Canadian sites important to the Manhattan Project. Click on the location for more information.
Oak Ridge hosted several uranium separation technologies. The Y-12 electromagnetic separation plant is in the upper right. The K-25 and K-27 gaseous diffusion plants are in the lower left, near the S-50 thermal diffusion plant. The X-10 was for plutonium production.
The S-50 plant is the dark building to the upper left behind the Oak Ridge powerhouse (with smoke stacks).
Map of the Hanford Site. Railroads flank the plants to the north and south. Reactors are the three northernmost red squares, along the Columbia River. The separation plants are the lower two red squares from the grouping south of the reactors. The bottom red square is the 300 area.
A row of Thin Man casings. Fat Man casings are visible in the background.
The explosives of "the gadget" were raised to the top of the tower for the final assembly.

Years later he would explain that another verse had also entered his head at that time:

Major General Leslie R. Groves, Jr., speaks to service personnel Oak Ridge Tennessee in August 1945.
Security poster, warning office workers to close drawers and put documents in safes when not being used

On handing over control to the Atomic Energy Commission, Groves bid farewell to the people who had worked on the Manhattan Project: