Staff Sgt. Julian Johnson, 768th Expeditionary Air Base Squadron NCO in charge of Heating Ventilation and Air Conditioning, opens the top of an HVAC unit at Nigerien Air Base 101, Niger, April 3, 2017. While cleaning the units, HVAC members spray the inside and outside of units, pull out and clean the air filters, and perform a systems check once finished. ( Air Force photo by Senior Airman Jimmie D. Pike)

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Size: 3000px × 2400px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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