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786 CES perfects purifying proficiency
U.S. Air Force Senior Airman Brandon Williams, 786th Civil Engineer Squadron water and fuel systems maintenance journeyman, conducts a water purification test during proficiency training at Ramstein Air Base, Germany, April 29, 2020. During his proficiency test, Williams leveled out the potential hydrogen (PH) of the water to ensure the reverse osmosis water purification unit functioned properly. (U.S. Air Force photo by Senior Airman Milton Hamilton)

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Photo by: Senior Airman Milton Hamilton |  VIRIN: 200429-F-VQ832-1033.JPG