Airman 1st Class An Ngo, 36th Medical Operations Squadron Bioenvironmental Engineering technician, sets up the Wet Bulb Global Temperature system at Andersen Air Force Base, Guam, Oct. 19, 2017. The Bioenvironmental Engineering Flight is responsible for testing Andersen’s water supply, heat index and air quality year round. (U.S. Air Force photo/Airman 1st Class Gerald R. Willis)
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