Base course, a soil support layer, is poured in preparation for the laying down of cement in front of the Holbrook Library at Ellsworth Air Force Base, , June 16, 2016. Thirty tons of base course was used to build new sidewalks as part of a renovations project for the base library. ( Air Force photo by Senior Airman Anania Tekurio/Released)

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Size: 2100px × 1500px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 28th, afb, bomb, civil, ellsworth, engineer, holbrook, library, squadron, wing