121106-A-BG264-001
ERDC Cold Regions Research and Engineering Laboratory Researcher Kevin Bjella, on left, guides U.S. Army Corps of Engineers Command Sgt. Maj. Karl J. Groninger through the Center’s permafrost tunnel, located in Fox, Alaska.

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Photo by: US Army Corps of Engineers |  VIRIN: 121106-A-BG264-001.JPG