Experienced mechanics complete specialized repair
Staff Sgt. Doug Miller plugs a hole on the exterior of a C-17 Globemaster III aircraft, May 23, 2017. The hole is plugged with aluminum using a cryogenic process where the aluminum shrinks during the freezing process and then expands once it is installed. The 167th maintainers installed a new jack support box, typically done at Air Force depot facilities, over a three week period at the wing.(U.S. Air National Guard phtoo by Senior Master Sgt. Emily Beightol-Deyerle)

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Photo by: Senior Master Sgt. Emily Beightol-Deyerle |  VIRIN: 170523-Z-PU513-006.JPG