Fogbank Is Mysterious Material Used In Nukes That's So Secret Nobody Can Say What It Is
www.twz.com
What we do know is that it's immensely complicated to make and has to be purified using a dangerously volatile chemical.
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The original was posted on /r/todayilearned by /u/tomekzak on 2024-10-09 16:07:45+00:00.

Original Title: TIL there’s a secret material called FOGBANK that is used in nuclear warheads. "The material is classified. Its composition is classified. Its use in the weapon is classified, and the process itself is classified.”