The only Chinese person working on the Manhattan Project was “First Lady of Physics” nuclear physicist Wu Jianxiong, whose experiments disproved the law of conservation of parity. She was the first living scientist to have an asteroid named after her. Also, her husband was Yuan Shikai‘s grandson.
While bored during his work with the Manhattan Project Richard Feynman would amuse himself by picking the locks of his colleagues confidential file cabinets and placing prank notes, his colleagues believed a spy had infiltrated the project.
During World War II, the multi-national Alsos Mission captured and dismantled a German experimental nuclear reactor.
Scientist Louis Slotin died while working on the Manhattan Project. He accidentally dropped a hemisphere of beryllium on a plutonium core; witnesses saw glowing blue light and felt a heat wave. He died nine days later. The plutonium core was later nicknamed the “demon core”.
Manhattan Project mathematician Richard Hamming was asked to check some arithmetic by a fellow researcher. Hamming planned to give it to a subordinate until he realized it was a set of calculations to see if the nuclear detonation would ignite the entire Earth’s atmosphere.
In 1946, a four year old Australian boy was flown to San Francisco to receive cancer treatment. Instead, he got caught in a Manhattan Project experiment and was injected with plutonium. He died one year later.
While bored during his work with the Manhattan Project, Richard Feynman would amuse himself by picking the locks of his colleges confidential file cabinets and placing prank notes, his colleges believed a spy had infiltrated the project.
For a Manhattan Project experiment Albert Stevens was secretly injected with what was expected to be a lethal dose of plutonium, and paid for providing samples of his urine and feces.
The Manhattan Project secretly tested the effects of radiation on its own citizens, including injecting pregnant women and feeding schoolboys radioactive oatmeal.
George Koval, Soviet master spy, infiltrated the Manhattan project, stole nearly all of our nuclear secrets, single-handedly provided the key technology for Russia’s nuclear arsenal, and was only discovered as a spy in 2002.