A portable water system designed by Karl Blair, 355th Civil Engineer Squadron journeyman utility man, sits at Davis-Monthan Air Force Base, Ariz., Jan. 9, 2015. The system provides potable water during emergency water outages allowing mission-critical workplaces to continue without interruption. (U.S. Air Force photo by Airman 1st Class Chris Massey)
Airman 1st Class Chris Massey
Taken on 9 January 2015
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