This is from the first world was when there was a real perceived threat of gas attack


Good cross section of wall, also bear in mind earth is banked around most of the building, pretty solid.


Entry into the airlock. Not the speaker, which would have been barking instructions to the contaminated troops frantically queuing!


Obligatory toilet shot


Chutes for contaminated ‘Gas Clothing’ and ‘Footware’








Air vent quite high up. The idea was that the gas would settle!


Hangers for uncontaminated, sterile clothing