786 CES perfects purifying proficiency
U.S. Air Force Senior Airman Brandon Williams, 786th Civil Engineer Squadron water and fuel systems maintenance journeyman, tests the chlorine level of a water vial at Ramstein Air Base, Germany, April 29, 2020. The 786th CES water and fuel systems maintenance personnel use four chemicals and several filters within the reverse osmosis water purification unit to provide consumable potable water for contingency and humanitarian operations. (U.S. Air Force photo by Senior Airman Milton Hamilton)

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Photo by: Senior Airman Milton Hamilton |  VIRIN: 200429-F-VQ832-1044.JPG