Petroleum Laboratory Specialist Course instructor Darius Martin explains the results of a fuel test Dec. 10 as students look on. The course is approximately 11 weeks long and is taught by the Quartermaster School's Petroleum and Water Department. ( Army photo by Terrance Bell/Released)

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

Keywords: 92l, fuel, martin, petroleum, pwd