So it's the 1940's and you've got the largest aircraft factory in the United States. The reality is you are at war with half the known world and The President will invent Guantanamo Bay just for you if the place gets bombed.

Oh what to do....

Well the easy answer is to use a cunning disguise...

This is a version of special effects during the 1940's.  During World War II the Army Corps of Engineers needed to hide the Lockheed Burbank Aircraft Plant to protect it from a possible Japanese air attack. They covered it with camouflage netting  to make it look like a rural subdivision from the air.

And underneath all this...