Senior Master Sgt. Nate Colborn, 434th Civil Engineer Squadron structural superintendent, scrapes cement as it flows down the trough into a form created to expand the patio at Bldg. 595. Colborn and other "Dirt Boys" from the 434th CES expanded the patio between the 434th Maintenance Group and base exchange entrances as part of a training opportunity at Grissom Air Reserve Base on Aug. 8, 2013. (U.S. Air Force photo/Tech. Sgt. Doug Hays)
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