During WW II Lockheed (unbelievable 1940’s pictures). This is a version of special effects during the 1940’s. I have never seen these pictures or knew that they had gone this far to protect themselves. 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.