You should read "The Dead Hand: The Untold Story of the Cold War Arms Race and its Dangerous Legacy" by David Hoffman. They basically had enriched uranium just

You should read "The Dead Hand: The Untold Story of the Cold War Arms Race and its Dangerous Legacy" by David Hoffman. They basically had enriched uranium just hanging around in a drafty warehouse that had a simple padlock on the door, with an underpaid guard to keep an eye on things. > Altogether, the team discovered 1,032 containers in the warehouse, and each had to be methodically unpacked, examined and repacked for transport into quart-sized cans that were then inserted into 448 shipping containers—55-gallon drums with foam inserts—for the flight. Laborious checking was necessary, each can compared with the Ulba handwritten logs. In the end, the Americans discovered several canisters lying in the warehouse without dog tags. Some of the uranium had to be heated in special ovens to remove water to facilitate the repacking. https://www.amazon.com/gp/product/B002PXFYPQ https://www.amazon.com/gp/product/B002PXFYPQ