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.

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Size: 1581px × 1265px
Photo credit: © Chuck Little / Alamy / Afripics
License: Licensed
Model Released: No

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