U.S. Air Force Tech Sgt. Mark Jurek, 366th Civil Engineering Squadron electrical sub activity management plan manager, operates a compass in a land navigation event Aug. 15, 2013, at Mountain Home Air Force Base, Idaho. The land navigation event was one of six events in the engineers’ challenges set up by 366th CES. (U.S. Air Force photo by Airman 1st Class Brittany A. Chase/released)
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