A 56th Civil Engineering Squadron general contractor uses equipment to compact dirt Dec. 8, 2016, at Luke Air Force Base, Ariz. The ground needs compacting to ensure the integrity of the building doesn’t sink or fail. ( Air Force photo by Airman 1st Class Pedro Mota)

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Size: 4774px × 7153px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: air, base, force, luke