The so-called Demon Core was a cursed object, a 6.2 kilogram mass of plutonium intended to be installed in a nuclear weapon. Instead, slapdash experimental techniques saw it feature in several ...

T he fabled Demon Core was a radioactive plutonium sphere housed in a beryllium hemisphere. By holding the hemisphere in place with one hand and levering it with a screwdriver in the other ...

One of the most important projects of the 20th century was also one of the most daring and destructive, and it reshaped the ...

In 1946, a P-239 plutonium core scheduled for detonation ... This is the true story of the Demon Core.

The Fat Man atomic bomb was dropped over Nagasaki on August 9, 1945. Built with a solid plutonium core, Fat Man was the second (following Little Boy that was dropped at Hiroshima on August 6 ...