This showed up in my email the other day:
This is pretty neat -- special effects during the 1940s. I have never seen these pictures or knew that we had gone this far to protect us. During World War II, the Army Corps of Engineers needed to hide the Lockheed Burbank Aircraft Plant to protect it from Japanese air attack. They covered it with camouflage netting to make it look like a rural subdivision from the air.
Before:
After:
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