Preppers speak of “bugging in” instead of “bugging out” in SHTF (you-know-what Hits The Fan) situations, in reinforced homes or even bunkers. My generation remembers when Washington told us we needed “fallout shelters” during the Cold War. I can relate to the theory.
Thanks to friend D. Diem who passed it along, we can see one helluva far-sighted Shelter, created decades before the penultimate SHTF, the World Wars. (We have to assume that the ultimate will be worldwide nuclear warfare, I guess.)
Check it out here: http://www.chonday.com/Videos/newyobasemese2 .