After about 40 years of standing ready to provide missile warning in the event of a war, the one-of-a-kind Mobile Ground System based in Greeley was recently retired.

“We employed it to the outer limits of its capabilities,” Col. Stephanie Figueroa, commander of the 233rd Space Group, said in a news release . “We had proven time and time again the mobility of that weapon system. We knew our role, and we were exceptional at it.”

Figueroa oversaw the 137th Space Warning Squadron, the unit charged with operating the Mobile Ground System as part of her work leading the 233rd Space Group, which employs about 400 people.

The 137th Space Warning Squadron had been expected to turn over the Mobile Ground System to the Space Force in October, under a law passed last year. It was one of several

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