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Nuclear Weapons Material



> I get the impression that PAL is a little more complex than that, one
> of the reputed goals is to prevent a weapon from being easily modified
> to go around safeguards.  Playing with just delays can be overcome 
> by characterizing delays in a dismantled weapon.

What I had heard was the the delays were implemented by varying the
chemical composition of the explosive lenses around the plutonium
core to modify their detonation rate.  This prevents replacing the
electronics to circumvent the security.