Insight about the atom bomb

After the discovery of Fermin, Szilard joined him in New York. Together they figured that a kilogram of uranium would make energy similar to 20,000 tonnes of TNT. However, Szilard knew that this discovery could be disastrous and feared that the Nazis would soon figure this out too.

In 1940, two German physicists working in the UK worked out how to produce uranium-235 in high quantities, how it could be used to make a bomb, and the disastrous consequences if they succeeded.