During World War 2, a single B-17 Bomber required over $200,000 to be produced. If we convert that into today's economy, that would be around $3.4 million. Since the US Army requested thousands of these warplanes, securing the Boeing factory was a top priority. And by "top priority", I mean the Army went all out by hiring Hollywood set designers to construct a fake neighborhood on top of the factory and even hired actors to act like it was a real neighborhood.
This movie prop "neighborhood" was built in 1944, with John Stewart Detlie as the set designer to hide the Boeing Plant No. 2. He used the same techniques used in movie towns, like building fake streets, sidewalks, trees, fences, cars, and houses, to trick potential attackers.
Meanwhile, underneath this fake neighborhood, about 30,000 workers - both men and women - worked tirelessly to build around 300 bomber planes per month. The aircraft were used to fight against the Nazis, with Boeing B-17 Flying Fortresses alone dropping over 640,000 tons of bombs over Germany during the conflict. Despite the high production numbers, only around fifty of the 12,731 Boeing planes were built to remain in complete form.
Fast forward to the 1960s, and the first Boeing 737s were assembled in Plant 2 but completed in the neighboring Thompson Site. Eventually, the production of the 737 was fully transferred to the Thompson Site. By the 1980s, Plant 2 was being used as a machine shop, but that soon ended as work shifted to more modern facilities. The structure fell into decay and was demolished by Boeing in 2010.