U.S. Air Force Senior Airman William Kreis, 20th Civil Engineer Squadron water and fuel systems journeyman, uses a Ditch Witch ground penetrating radar to view the underground systems at Shaw Air Force Base, S.C., June 1, 2016. The various systems, such as water and sewer pipes, need to be identified and recorded to help future construction workers avoid complications. (Airman 1st Class Destinee Dougherty)
<br>Unit: 20th Fighter Wing Public Affairs
Airman 1st Class Destinee Dougherty
Taken on 1 June 2016
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