Air Force Tech. Sgt. Kyle Martinez, a crew chief assigned to the 127th Maintenance Group, Michigan Air National Guard, pours oil into the A-10 Thunderbolt II aircraft engine at the Sawyer International Airport in the Upper Peninsula’s Gwinn, Michigan, Aug. 3, 2021. This oil provides lubricant to engine components to avoid seizing or overheating and is pertinent for long-term engine sustainment.

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Keywords: -domain, 21, center, exercise, force, guard, joint, national, northern, strike, warfighting