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Tech. Sgt. Marco De La Cruz, a member of the 146th Security Force Squadron, 146th Airlift Wing, Channel Islands Air National Guard Station, Calif. uses a sand table, a three-dimensional version of a grid map, to illustrate how maps are a vital aid when traversing rough torrain as well as obtaining intelligence on a possible target. Security Force Squadron members from the 146 AW practiced patrol tactics in the woods at Joint Base Elmendorf-Richardson, Anchorage, Alaska June 2011. (Photo by Tech. Sgt. Alex Koenig)
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