Facts about the Manhattan Project
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A 1945 security concern at Los Alamos arose when physicist Klaus Fuchs transmitted atomic bomb design details to Soviet intelligence, remaining undetected until 1950 when he confessed to espionage.
- 09
Hanford Site in Washington State produced the plutonium used in the Nagasaki bomb through nine nuclear reactors operating secretly from 1944 onward.
- 08
Trinity, the first nuclear weapons test on July 16, 1945, in New Mexico released energy equivalent to 22,000 tons of TNT, obliterating the test tower and creating a mushroom cloud visible from 160 kilometers away.
- 07
General Leslie Groves commanded the entire Manhattan Project from 1942 to 1946, overseeing a secret military operation spanning multiple states with a staff exceeding 130,000 workers.
- 06
Approximately 600,000 tons of uranium ore were processed at the Manhattan Project's facilities to produce just 64 kilograms of enriched uranium for the Hiroshima bomb.
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Physicist J. Robert Oppenheimer directed the Los Alamos Laboratory from 1943 to 1945, where approximately 3,000 scientists and engineers designed the first atomic bombs.
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Oak Ridge, Tennessee's uranium enrichment facility consumed as much electricity as the entire city of Detroit during its peak 1945 operations for the Manhattan Project.
- 03
Between 1945 and 1946, the Manhattan Project's total cost reached approximately 2 billion dollars, equivalent to roughly 30 billion in 2024 currency.
- 02
In 1942, physicist Enrico Fermi achieved the first controlled nuclear chain reaction beneath Stagg Field at the University of Chicago, a critical breakthrough for the Manhattan Project's weapons development.
- 01
Over 130,000 workers were employed across secret Manhattan Project sites by 1945, yet most never knew the true purpose of their work.