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130816-Z-EZ686-035 Airman First Class Bryan Douroujalian, 127th Civil Engineer Squadron, uses a R7 GPS surveying system as a tool for updating the base map at Selfridge Air National Guard Base, Mich., Aug. 16, 2013. Douroujalian has been working with the 127th Civil Engineers since 2012. (U.S. Air National Guard photo by TSgt. David Kujawa)
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