There may have been a national security aspect to making it look like a normal house, bunkers have been disguised in a similar way [1] elsewhere. [1] https://e

There may have been a national security aspect to making it look like a normal house, bunkers have been disguised in a similar way [1] elsewhere. [1] https://en.wikipedia.org/wiki/ROTOR https://en.wikipedia.org/wiki/ROTOR