Is this actually a case of lost knowledge or just classified details being buried so deep even the current NNSA team didn't have access to the original specs?
ahazred8ta•about 2 hours ago
The old process depended on a small amount of undocumented residue that was removed in the new process.
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Obligatory FreeFall reference http://freefall.purrsia.com/ff1500/fc01415.htm