system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 : When building secretive buildings and other stuff by the government how do they make sure the labourers and workers who built it keep it's location secure?

How do they make sure the workers don't leak their location to enemy countries?
gpt
There's no perfect solution, most secret operations are not a matter of if other countries will find out but when... They can delay how quickly their enemy knows about their buildings but they can't perfectly hide them forever.

The primary method to keep secrets is to divide information and projects up between groups who each don't know what the other is doing. Each group works on a piece of the project without knowing what the other pieces are, and the person above them only knows what they need to know to command the people below them. So when building something secretive, the people involved know very little about what they're actually building. One guy just knows he has to clear the area of rubble, the next guy just knows he has to build concrete walls, the next guy just knows he needs to wire the electricity for certain rooms, the next guy just knows he's bringing in some computer equipment... Etc. Of course people aren't dumb and they will draw their own conclusions about what they're working on, but they won't have all the information.

With secretive projects, only a select few really know all the information.