786 CES perfects purifying proficiency
U.S. Air Force Senior Airman Brandon Williams, 786th Civil Engineer Squadron water and fuel systems maintenance journeyman, performs a proficiency test on the reverse osmosis water purification unit at Ramstein Air Base, Germany, April 29, 2020. The proficiency training enables 786th CES water and fuel systems maintenance personnel to properly employ a ROWPU to regulate chemical levels in the water on military bases. (U.S. Air Force photo by Senior Airman Milton Hamilton)

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Photo by: Senior Airman Milton Hamilton |  VIRIN: 200429-F-VQ832-1051.JPG