Jeffers Electronics made parts for the "Manhattan Project". My father worked there and I asked him once why they had barbed wire fence around. He said it was "required" for defense plants at that time. Jeffers was purchased by Airco Speer who closed and moved to Mexico in '70 or '71. We didn't relocate although some did.
Airco gave the building to the City in hopes they could attract a business to replace the loss. The City sold it to the Rola Jensen Corp. Who made speakers here for a short time. When Rola closed, the plant manager ended up with the deed. He later sold it to Paris for a tidy sum... so much for caring for the community. Barbed wire still there today ( in case someone tries to steal my work uniforms ).