Chicago Air Defense Sector, Military site in the United States of America
The Chicago Air Defense Sector was a unit established to protect Chicago and the surrounding area from aerial attack.
Created during the Cold War, it operated from 1957 until 1966.
The sector's command center reflects the post-WWII militarization period in American history.
The site is now repurposed, no longer serving its original function.
Part of the SAGE (Semi-Automatic Ground Environment) network, a groundbreaking air defense system.
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