Air Force Senior Airman Devin Brown-Redfearn, 31st Logistics Readiness Squadron petroleum oils and lubricants lab technician, uses an automated density reader to determine the temperature and density of fuel, Aug. 25, 2015, at Aviano Air Base, Italy. The fuels laboratory ensures fuel quality by running it through a series of tests, including checking for water, which can cause aircraft engine malfunctions at high altitudes. ( Air Force photo by Senior Airman Areca T. Wilson/Released)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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