Most of Europe's Cold War Bunker Infrastructure Is Ill-Prepared for War
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This WWII bunker used a fake air vent to return grenade to sender
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/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/24/60/2460b558-79ae-4426-a721-60b0ef3cc1f2/commonwealth_h128rv80s_access_full.jpg "Digging Up the History of the Nuclear Fallout Shelter | History| Smithsonian Magazine")
Digging Up the History of the Nuclear Fallout Shelter | History| Smithsonian Magazine
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Historian examining the ventilation system of a WWII bunker in Koblenz, Rhineland-Palatinate, Germany Stock Photo - Alamy
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Andelfingen. Fallout shelter. Bunker. Bunk beds. Ventilation system. Locked emergency door | Didier Ruef | Photography
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The potential influence of building optimization and passive design strategies on natural ventilation systems in underground buildings: The state of the art - ScienceDirect
