U.S. Air Forces in Europe & Air Forces Africa
U.S. Air Force Tech. Sgt. Kristopher Beckwith, 768th Expeditionary Air Base Squadron bioenvironmental engineer, puts the sample jars with colisure powder in an incubator to test for water quality at Nigerien Air Base 101, Niamey, Niger, Feb. 16, 2021. The jars are left in the incubator for 24 hours at 35 degrees Celsius to get an accurate reading of water quality. (U.S. Air Force photo by Senior Airman Gabrielle Winn)
24.0-70.0 mm f/2.8
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