In the movie:
Bane's crew is working in the tunnels and sewers of Gotham. One of their goals is to burrow under Wayne Tower and get into Bruce's personal armory.
But this made me wonder, how does Bane know the exact location of
It's stated in the movie that
His armory is locked up tight and only he and Fox know about it's existence. As far as we know, not even Natalia knows its location.
So how did Bane know?