Aircraft cavern

Aircraft cavern, a calque of the German word Flugzeugkaverne, is an underground hangar amongst others used by the Swiss Air Force. ==Historical== During WW2 the neutral Swiss military airfields were for the first time equipped with simple semi round concrete U-43 type shelters protecting the aircraft parked underneath. After WW2, starting in 1947 ...
Found on http://en.wikipedia.org/wiki/Aircraft_cavern
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