Senior Airman Patrick Archer and Airman 1st Class Jonathon Simmons, both 319th Civil Engineer Squadron pet management journeymen, observe a water sample June 13, 2018, on Grand Forks Air Force Base, North Dakota. The pest management section collects samples of water often to observe and monitor mosquito larvae populations and determine the best course of action. (U.S. Air Force photo by Airman 1st Class Melody Wolff)
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