Staff Sgt. Nathan Coleman, 366th Civil Engineer Squadron structural journeyman, welds a hammer together during a training exercise, Dec. 6, 2017, at Mountain Home Air Force Base, Idaho. The base participated in a week-long training exercise to train for real world contingencies. (U.S. Air Force photo by Airman 1st Class Alaysia Berry)

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Photo by: Airman 1st Class Alaysia Berry |  VIRIN: 171206-F-IX896-0003.JPG