Along these lines, for anyone who hasn't heard of it: At the Trinity test, there was a containment unit called Jumbo: https://www.atomicheritage.org/history/j

Along these lines, for anyone who hasn't heard of it: At the Trinity test, there was a containment unit called Jumbo: https://www.atomicheritage.org/history/jumbo https://www.atomicheritage.org/history/jumbo Basically, if Trinity fizzled, they wanted to be able to recover the billion dollar plutonium core. It didn't actually end up being used, and so it was ordered destroyed. But the thing was so tough that they essentially couldn't blow it up. Normal bombs just weren't powerful enough. So now it's just sitting there at the site.