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Apparently there is quite an industry around doomsday. A little commitment to the society they're hiding from might be money better spent. As individuals we should all do some sensible disaster planning but this looks to be a bridge too far. In the end, I'm not sure how valuable these money guys will be to the guys with guns hired to protect them. I imagine it was a fun book to write.
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(Top pic) Now that's a door!
I like your take on a little commitment.
When the plane crashes, the folks in first class die about the same time as those in the back.
Brought this to mind:
Fixing A Hole - YouTube
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Nuclear missile silos are not longer on the market. The cold war restarted years ago. New nuclear missiles are are reclaiming Doomsday shelters.