An artillery shell landed on Rich and Kathy Nelson's property in Pillager, Minn.
The more than 100-pound round flew over the couple's garage and damaged some trees earlier this month.
Officials at nearby Camp Ripley say no one was hurt and the couple wasn't home.
But a constructor's crew installing cabinets was taking a break at the time.
Camp Ripley is changing its artillery range procedures following the mishap.
Officials say a defense contractor was conducting test firings when the shell flew nearly a-half mile off base property.
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