Dirt Boyz
Airman 1st Class Zachary Downing, 51st Civil Engineer Squadron pavement and construction equipment apprentice, jackhammers out a broken section of pavement before the mixing, pouring, and finishing of the new concrete patch can begin on the airfields of Osan Air Base, Republic of Korea, June 27, 2015. As a member of the group known as the "Dirt Boyz," Downing is trained to operate a vast array of heavy machinery.
(USAF photo by Staff Sgt. Amber Grimm)