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KADENA AIR BASE, Japan - U.S. Air Force Master Sgt. Jason Yunker, right, 18th Logistics Readiness Squadron fuels quality and compliance section chief, explains his spark tank invention to U.S. Air Force Chief of Staff Gen. CQ Brown, Jr., left, during his visit to Kadena Air Base, Japan, Aug. 11, 2022. Yunker’s project, which won first place in the Pacific Air Forces Spark Tank 2022, repurposed pieces of unused equipment to create an additive injector which converts commercial fuel into military-grade fuel acceptable for aircraft.


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