Blind repairs
Master Sgt. Zach Kuno, 141st Maintenance Squadron, Aircraft Fuel Systems supervisor, feels around for possible sealant corrosion inside a KC-135 Stratotanker fuel tank at Fairchild Air Force Base, Washington, Nov. 21, 2017. The stress endured by aircraft during flight can strain and wear away seals on fuel tanks, requiring Airmen to enter and repair them. (U.S. Air Force photo/Senior Airman Ryan Lackey)

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Photo by: SrA Ryan Lackey |  VIRIN: 171204-F-HU835-126.JPG