A U.S. Airman assigned to the 20th Fighter Wing puses a pneumatic 30-pound jack hammer to break concrete at Shaw Air Force Base, S.C., Aug. 10, 2017. By using a jack hammer, the Airmen broke the concrete into smaller pieces for easier removal. (U.S. Air Force photo by Airman 1st Class Kathryn R.C. Reaves)
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