Staff Sgt. Mardie Wilson, 8th Civil Engineering Squadron pavements and construction equipment, uses a jack hammer to shatter concrete during a fire repression system repair, Feb. 9, 2012 at Kunsan Air Base, Republic of Korea. Pavements and construction equipment specialists construct, maintain and inspect concrete and asphalt runways, aircraft parking aprons and roads, support contingency operations by constructing bas facilities and install and maintain drainage structures. (U.S. Air Force photo/Senior Airman Brittany Y. Auld/Released)